阅读说明：本技术 一种专用水泥混凝土抗裂防渗聚丙烯网状纤维及其制备方法 (Special cement concrete anti-cracking anti-seepage polypropylene reticular fiber and preparation method thereof ) 是由 余明思 李树婷 余光全 于 2021-07-21 设计创作，主要内容包括：本发明涉及建筑材料技术领域,具体地说,涉及一种专用水泥混凝土抗裂防渗聚丙烯网状纤维及其制备方法。其包括丙烯、活化剂、催化剂、氢气、增强剂和处理剂组成。该专用水泥混凝土抗裂防渗聚丙烯网状纤维中,通过采用增强剂可以提高聚丙烯纤维的粘结性,提高聚丙烯纤维的抗裂能力,并通过添加处理剂不仅可以防止水泥结块并且提高水泥的固化性,增强剂和处理剂可配合提高聚丙烯纤维与水泥混凝土之间的结合度从而加强水泥混凝土扛渗透能力。(The invention relates to the technical field of building materials, in particular to special cement concrete anti-cracking and anti-seepage polypropylene reticular fiber and a preparation method thereof. The catalyst comprises propylene, an activating agent, a catalyst, hydrogen, a reinforcing agent and a treating agent. In the special anti-cracking and anti-seepage polypropylene reticular fiber for the cement concrete, the caking property of the polypropylene fiber can be improved and the anti-cracking capability of the polypropylene fiber can be improved by adopting the reinforcing agent, the caking of the cement can be prevented and the curing property of the cement can be improved by adding the treating agent, and the reinforcing agent and the treating agent can be matched to improve the combination degree between the polypropylene fiber and the cement concrete so as to enhance the penetration capability of the cement concrete.)

1. The special cement concrete anti-cracking and anti-seepage polypropylene reticular fiber is characterized in that: the feed comprises the following raw materials: 50-60% of propylene, 5-10% of an activating agent, 5-10% of a catalyst, 20-40% of hydrogen, 5-15% of a reinforcing agent and 8-11% of a treating agent.

2. The special cement concrete anti-cracking impermeable polypropylene reticular fiber according to claim 1, which is characterized in that: the activating agent is azodiisobutyronitrile, and the treating agent is alkyl phosphonic acid ethanolamine.

3. The special cement concrete anti-cracking impermeable polypropylene reticular fiber according to claim 1, which is characterized in that: the catalyst is a Ziegler-Natta catalyst and consists of triethyl aluminum and titanium tetrachloride.

4. The special cement concrete anti-cracking impermeable polypropylene reticular fiber according to claim 1, which is characterized in that: the reinforcing agent is polycarbonate.

5. The preparation method of the special cement concrete anti-cracking and anti-seepage polypropylene reticular fiber is characterized by comprising the special cement concrete anti-cracking and anti-seepage polypropylene reticular fiber of any one of claims 1 to 4, and the operation steps are as follows:

s1.1, weighing: selecting and weighing propylene, an activating agent, a catalyst, hydrogen, a reinforcing agent and a treating agent;

s1.2, feeding: putting propylene into the kettle type reactor, heating and melting the propylene to a liquid phase;

s1.3, catalysis: adding an activating agent and a catalyst into liquid-phase propylene;

s1.4, gas filling: introducing hydrogen into liquid-phase propylene to polymerize the propylene to form polypropylene fiber particles;

s1.5, strengthening: putting a reinforcing agent and polypropylene fiber particles into a reactor, combining and putting a treating agent;

s1.6, drying: drying the produced polypropylene fiber;

s1.7, stretching: stretching polypropylene fiber particles to form a multilayer co-film;

s1.8, net making: the film-shaped polypropylene fiber particles are spread into a net shape to form polypropylene net-shaped fibers.

6. The preparation method of the special cement concrete anti-cracking anti-seepage polypropylene reticular fiber according to claim 5, which is characterized in that: the temperature of the polypropylene fiber in S1.2-S1.5 is 65-75 ℃, and the pressure is 2.5-3.5 MPa.

7. The preparation method of the special cement concrete anti-cracking anti-seepage polypropylene reticular fiber according to claim 5, which is characterized in that: in S1.7, the specific steps of stretching the polypropylene fiber particles are as follows:

s2.1, slicing: extruding the polypropylene fiber particles to form sheet-shaped polypropylene fibers;

s2.2, film forming: the sheet-like polypropylene fibers are stretched in both longitudinal and transverse directions to form a polypropylene fiber film.

8. The preparation method of the special cement concrete anti-cracking anti-seepage polypropylene reticular fiber according to claim 5, which is characterized in that: in the step S1.8, after the polypropylene fiber membrane is put into the concrete, in the concrete stirring process, the transverse connection between the fiber monofilaments is broken by the kneading and friction of the concrete, so that the polypropylene fiber mesh structure is fully opened, thereby obtaining the polypropylene mesh fibers.

Technical Field

The invention relates to the technical field of building materials, in particular to special cement concrete anti-cracking and anti-seepage polypropylene reticular fiber and a preparation method thereof.

Background

Concrete has the advantages of high compressive strength, fire resistance, water resistance, durability and the like, so concrete and products thereof become main materials for construction, civil engineering, water conservancy and other projects, however, the concrete has the defects of low tensile strength, brittleness and the like due to the fact that the concrete is corroded by steel bars in the concrete caused by the fact that the concrete is cracked when cement is solidified, the open road is subjected to factors such as load from vehicles and weather rainfall, the requirement on the concrete is high, the concrete is invaded by liquid such as rainwater when the concrete is cracked, the concrete is easily cracked due to corrosion inside, and therefore, the polypropylene fiber for the concrete with good cracking and penetration preventing capability is needed.

Disclosure of Invention

The invention aims to provide a special cement concrete anti-cracking anti-seepage polypropylene reticular fiber and a preparation method thereof, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention aims to provide the special cement concrete anti-cracking and anti-seepage polypropylene reticular fiber which comprises the following raw materials: 50-60% of propylene, 5-10% of an activating agent, 5-10% of a catalyst, 20-40% of hydrogen, 5-15% of a reinforcing agent and 8-11% of a treating agent.

As a further improvement of the technical scheme, the activating agent is azodiisobutyronitrile, and the treating agent is alkylphosphonic acid ethanolamine.

As a further improvement of the technical scheme, the catalyst is a Ziegler-Natta catalyst and consists of triethyl aluminum and titanium tetrachloride.

As a further improvement of the technical scheme, the reinforcing agent is polycarbonate.

A preparation method of special cement concrete anti-cracking and anti-seepage polypropylene reticular fiber comprises any one of the above special cement concrete anti-cracking and anti-seepage polypropylene reticular fiber, and comprises the following operation steps:

s1.1, weighing: selecting and weighing propylene, an activating agent, a catalyst, hydrogen, a reinforcing agent and a treating agent;

s1.2, feeding: putting propylene into the kettle type reactor, heating and melting the propylene to a liquid phase;

s1.3, catalysis: adding an activating agent and a catalyst into liquid-phase propylene;

s1.4, gas filling: introducing hydrogen into liquid-phase propylene to polymerize the propylene to form polypropylene fiber particles;

s1.5, strengthening: putting a reinforcing agent and polypropylene fiber particles into a reactor, combining and putting a treating agent;

s1.6, drying: drying the produced polypropylene fiber;

s1.7, stretching: stretching polypropylene fiber particles to form a multilayer co-film;

s1.8, net making: the film-shaped polypropylene fiber particles are spread into a net shape to form polypropylene net-shaped fibers.

Preferably, the temperature of the polypropylene fiber in S1.2-S1.5 is 68-75 ℃, and the pressure is 2.5-3.5 MPa.

Preferably, in S1.7, the polypropylene fiber particle drawing specifically comprises the following steps:

s2.1, slicing: extruding the polypropylene fiber particles to form sheet-shaped polypropylene fibers;

s2.2, film forming: the sheet-like polypropylene fibers are stretched in both longitudinal and transverse directions to form a polypropylene fiber film.

Preferably, in S1.8, after the polypropylene fiber membrane is put into the concrete, in the concrete stirring process, the transverse connection between the fiber monofilaments is broken by the kneading and friction of the concrete, so that the polypropylene fiber mesh structure is fully opened, thereby obtaining the polypropylene mesh fibers.

The invention adds the reinforcing agent, namely polycarbonate, so that the cohesiveness of the polypropylene fiber can be improved, and the crack resistance of the polypropylene fiber can be improved.

The addition of the processing agent, namely the alkyl phosphonic acid ethanolamine, can not only prevent cement from caking and improve the curing property of the cement, but also improve the binding degree between polypropylene fiber and cement concrete by matching with polycarbonate, thereby enhancing the permeability of the cement concrete.

Compared with the prior art, the invention has the beneficial effects that:

1. in the special anti-cracking and anti-seepage polypropylene reticular fiber for the cement concrete and the preparation method thereof, the production efficiency of the polypropylene fiber can be improved by a mode of firstly sheeting and then film forming.

2. In the special anti-cracking and anti-seepage polypropylene reticular fiber for the cement concrete and the preparation method thereof, the reinforcing agent, namely polycarbonate, can have cohesiveness with the polypropylene fiber under alkaline conditions, so that the cement concrete near the fiber is combined with the fiber to improve the cracking performance, the alkyl phosphonate ethanolamine is arranged to improve the affinity between the fiber and the cement, and the combination of the polycarbonate and the alkyl phosphonate ethanolamine can improve the combination degree of the fiber and the cement so as to enhance the permeability of the cement concrete.

Drawings

FIG. 1 is an overall flow diagram of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Embodiment 1 a special cement concrete anti-crack anti-seepage polypropylene reticular fiber and a preparation method thereof, comprising the following steps:

firstly, weighing:

raw materials of 50% of propylene, 20% of hydrogen, 5% of an activating agent, 5% of a catalyst, 5% of a reinforcing agent and 10% of a treating agent are weighed to be prepared for standby.

Secondly, feeding:

feeding propylene into the kettle type reactor, heating the propylene until the propylene is liquefied into a liquid phase, and keeping the temperature in the kettle type reactor at 65-75 ℃ and the pressure at 2.5-3.5 MPa.

Thirdly, catalyzing:

and adding an activating agent, namely the azodiacetonitrile into the kettle type reactor, cracking the azodiacetonitrile, combining the azodiacetonitrile with propylene to form a monomer initiator, guiding the propylene to start polymerizing to form polypropylene, and continuously adding a catalyst, namely a Ziegler-Natta catalyst, into the kettle type reactor to accelerate the rate of the propylene polymerizing to form the polypropylene.

Fourthly, gas filling:

and introducing hydrogen into the kettle type reactor, wherein the hydrogen is contacted with liquid-phase propylene and polypropylene to adjust the length of a polypropylene molecular chain and stop the continuous growth of the carbon chain so as to generate the required polypropylene fiber particles.

Fifthly, strengthening:

the method comprises the steps of putting a reinforcing agent, namely polycarbonate into a tank reactor, enabling the polycarbonate to be in contact with polypropylene fiber particles and combined with the polypropylene fiber particles, enabling silicate components in concrete of the polypropylene fiber cement machine to have cohesiveness under alkaline conditions, putting a treating agent, namely alkyl phosphonic acid ethanolamine into the tank reactor, enabling the alkyl phosphonic acid ethanolamine to be in contact with the polypropylene fibers, carrying out affinity treatment on the surfaces of the polypropylene fibers, improving the water dispersibility of the polypropylene fibers and the affinity between the polypropylene fibers and cement, enabling the fibers to be highly combined with the cement concrete, and enabling the polypropylene fibers to have good concrete anti-cracking capacity.

Sixthly, drying:

and taking the polypropylene fiber particles out of the kettle type reactor, and drying the polypropylene fiber particles.

Seventhly, stretching:

stretching polypropylene fiber particles to form a multilayer co-film, comprising the steps of:

(1) sheeting: extruding the polypropylene fiber particles to form sheet-shaped polypropylene fibers;

(2) film forming: the sheet-like polypropylene fibers are stretched in both longitudinal and transverse directions to form a polypropylene fiber film.

Eighthly, net manufacturing:

the method comprises the specific steps that after a polypropylene fiber membrane is put into concrete, in the concrete stirring process, transverse connection among fiber monofilaments is broken by kneading and friction of the concrete to enable a polypropylene fiber mesh structure to be fully opened, so that the polypropylene mesh fiber is obtained.

Embodiment 2 a special cement concrete anti-crack anti-seepage polypropylene reticular fiber and a preparation method thereof, comprising the following steps:

firstly, weighing:

raw materials of 50 percent of propylene, 20 percent of hydrogen, 5 percent of activating agent, 5 percent of catalyst, 7 percent of reinforcing agent and 13 percent of treating agent are weighed to be prepared for standby.

Secondly, feeding:

feeding propylene into the kettle type reactor, heating the propylene until the propylene is liquefied into a liquid phase, and keeping the temperature in the kettle type reactor at 65-75 ℃ and the pressure at 2.5-3.5 MPa.

Thirdly, catalyzing:

and adding an activating agent, namely the azodiacetonitrile into the kettle type reactor, cracking the azodiacetonitrile, combining the azodiacetonitrile with propylene to form a monomer initiator, guiding the propylene to start polymerizing to form polypropylene, and continuously adding a catalyst, namely a Ziegler-Natta catalyst, into the kettle type reactor to accelerate the rate of the propylene polymerizing to form the polypropylene.

Fourthly, gas filling:

and introducing hydrogen into the kettle type reactor, wherein the hydrogen is contacted with liquid-phase propylene and polypropylene to adjust the length of a polypropylene molecular chain and stop the continuous growth of the carbon chain so as to generate the required polypropylene fiber particles.

Fifthly, strengthening:

the method comprises the steps of putting a reinforcing agent, namely polycarbonate into a tank reactor, enabling the polycarbonate to be in contact with polypropylene fiber particles and combined with the polypropylene fiber particles, enabling silicate components in concrete of the polypropylene fiber cement machine to have cohesiveness under alkaline conditions, putting a treating agent, namely alkyl phosphonic acid ethanolamine into the tank reactor, enabling the alkyl phosphonic acid ethanolamine to be in contact with the polypropylene fibers, carrying out affinity treatment on the surfaces of the polypropylene fibers, improving the water dispersibility of the polypropylene fibers and the affinity between the polypropylene fibers and cement, enabling the fibers to be highly combined with the cement concrete, and enabling the polypropylene fibers to have good concrete anti-cracking capacity.

Sixthly, drying:

and taking the polypropylene fiber particles out of the kettle type reactor, and drying the polypropylene fiber particles.

Seventhly, stretching:

stretching polypropylene fiber particles to form a multilayer co-film, comprising the steps of:

(1) sheeting: extruding the polypropylene fiber particles to form sheet-shaped polypropylene fibers;

(2) film forming: the sheet-like polypropylene fibers are stretched in both longitudinal and transverse directions to form a polypropylene fiber film.

Eighthly, net manufacturing:

the method comprises the specific steps that after a polypropylene fiber membrane is put into concrete, in the concrete stirring process, transverse connection among fiber monofilaments is broken by kneading and friction of the concrete to enable a polypropylene fiber mesh structure to be fully opened, so that the polypropylene mesh fiber is obtained.

Embodiment 3 a special cement concrete anti-crack anti-seepage polypropylene reticular fiber and a preparation method thereof, comprising the following steps:

firstly, weighing:

raw materials of 50% of propylene, 20% of hydrogen, 5% of an activating agent, 5% of a catalyst, 10% of a reinforcing agent and 10% of a treating agent are weighed to be prepared for standby.

Secondly, feeding:

feeding propylene into the kettle type reactor, heating the propylene until the propylene is liquefied into a liquid phase, and keeping the temperature in the kettle type reactor at 65-75 ℃ and the pressure at 2.5-3.5 MPa.

Thirdly, catalyzing:

and adding an activating agent, namely the azodiacetonitrile into the kettle type reactor, cracking the azodiacetonitrile, combining the azodiacetonitrile with propylene to form a monomer initiator, guiding the propylene to start polymerizing to form polypropylene, and continuously adding a catalyst, namely a Ziegler-Natta catalyst, into the kettle type reactor to accelerate the rate of the propylene polymerizing to form the polypropylene.

Fourthly, gas filling:

and introducing hydrogen into the kettle type reactor, wherein the hydrogen is contacted with liquid-phase propylene and polypropylene to adjust the length of a polypropylene molecular chain and stop the continuous growth of the carbon chain so as to generate the required polypropylene fiber particles.

Fifthly, strengthening:

the method comprises the steps of putting a reinforcing agent, namely polycarbonate into a tank reactor, enabling the polycarbonate to be in contact with polypropylene fiber particles and combined with the polypropylene fiber particles, enabling silicate components in concrete of the polypropylene fiber cement machine to have cohesiveness under alkaline conditions, putting a treating agent, namely alkyl phosphonic acid ethanolamine into the tank reactor, enabling the alkyl phosphonic acid ethanolamine to be in contact with the polypropylene fibers, carrying out affinity treatment on the surfaces of the polypropylene fibers, improving the water dispersibility of the polypropylene fibers and the affinity between the polypropylene fibers and cement, enabling the fibers to be highly combined with the cement concrete, and enabling the polypropylene fibers to have good concrete anti-cracking capacity.

Sixthly, drying:

and taking the polypropylene fiber particles out of the kettle type reactor, and drying the polypropylene fiber particles.

Seventhly, stretching:

stretching polypropylene fiber particles to form a multilayer co-film, comprising the steps of:

(1) sheeting: extruding the polypropylene fiber particles to form sheet-shaped polypropylene fibers;

(2) film forming: the sheet-like polypropylene fibers are stretched in both longitudinal and transverse directions to form a polypropylene fiber film.

Eighthly, net manufacturing:

the method comprises the specific steps that after a polypropylene fiber membrane is put into concrete, in the concrete stirring process, transverse connection among fiber monofilaments is broken by kneading and friction of the concrete to enable a polypropylene fiber mesh structure to be fully opened, so that the polypropylene mesh fiber is obtained.

Embodiment 4 a special cement concrete anti-crack anti-seepage polypropylene reticular fiber and a preparation method thereof, comprising the following steps:

firstly, weighing:

raw materials of 50% of propylene, 20% of hydrogen, 5% of an activating agent, 5% of a catalyst, 5% of a reinforcing agent and 15% of a treating agent are weighed to be prepared for standby.

Secondly, feeding:

feeding propylene into the kettle type reactor, heating the propylene until the propylene is liquefied into a liquid phase, and keeping the temperature in the kettle type reactor at 65-75 ℃ and the pressure at 2.5-3.5 MPa.

Thirdly, catalyzing:

and adding an activating agent, namely the azodiacetonitrile into the kettle type reactor, cracking the azodiacetonitrile, combining the azodiacetonitrile with propylene to form a monomer initiator, guiding the propylene to start polymerizing to form polypropylene, and continuously adding a catalyst, namely a Ziegler-Natta catalyst, into the kettle type reactor to accelerate the rate of the propylene polymerizing to form the polypropylene.

Fourthly, gas filling:

and introducing hydrogen into the kettle type reactor, wherein the hydrogen is contacted with liquid-phase propylene and polypropylene to adjust the length of a polypropylene molecular chain and stop the continuous growth of the carbon chain so as to generate the required polypropylene fiber particles.

Fifthly, strengthening:

the method comprises the steps of putting a reinforcing agent, namely polycarbonate into a tank reactor, enabling the polycarbonate to be in contact with polypropylene fiber particles and combined with the polypropylene fiber particles, enabling silicate components in concrete of the polypropylene fiber cement machine to have cohesiveness under alkaline conditions, putting a treating agent, namely alkyl phosphonic acid ethanolamine into the tank reactor, enabling the alkyl phosphonic acid ethanolamine to be in contact with the polypropylene fibers, carrying out affinity treatment on the surfaces of the polypropylene fibers, improving the water dispersibility of the polypropylene fibers and the affinity between the polypropylene fibers and cement, enabling the fibers to be highly combined with the cement concrete, and enabling the polypropylene fibers to have good concrete anti-cracking capacity.

Sixthly, drying:

and taking the polypropylene fiber particles out of the kettle type reactor, and drying the polypropylene fiber particles.

Seventhly, stretching:

stretching polypropylene fiber particles to form a multilayer co-film, comprising the steps of:

(1) sheeting: extruding the polypropylene fiber particles to form sheet-shaped polypropylene fibers;

(2) film forming: the sheet-like polypropylene fibers are stretched in both longitudinal and transverse directions to form a polypropylene fiber film.

Eighthly, net manufacturing:

the method comprises the specific steps that after a polypropylene fiber membrane is put into concrete, in the concrete stirring process, transverse connection among fiber monofilaments is broken by kneading and friction of the concrete to enable a polypropylene fiber mesh structure to be fully opened, so that the polypropylene mesh fiber is obtained.

The invention adds the reinforcing agent, namely polycarbonate, so that the cohesiveness of the polypropylene fiber can be improved, and the crack resistance of the polypropylene fiber can be improved.

The addition of the processing agent, namely the alkyl phosphonic acid ethanolamine, can not only prevent cement from caking and improve the curing property of the cement, but also improve the binding degree between polypropylene fiber and cement concrete by matching with polycarbonate, thereby enhancing the permeability of the cement concrete.

The crack resistance of the special cement concrete crack-resistant anti-seepage polypropylene reticular fiber prepared by the invention can be improved, and the crack resistance detection indexes of the special cement concrete crack-resistant anti-seepage polypropylene reticular fiber prepared by the invention are shown as

Table 1:

	tensile strength/Mpa	Modulus of elasticity/MPa
			Example 1	561	3600
Example 2	570	3750
			Example 3	620	4500
Example 4	600	4200

TABLE 1

As can be seen from Table 1, in examples 1-4, the tensile strength and the elastic modulus of the polypropylene fiber are both 560MPa or more and 3600MPa or more, and when the material comprises 50% of propylene, 20% of hydrogen, 5% of an activator, 5% of a catalyst, 10% of a reinforcing agent and 10% of a treating agent, the tensile strength and the elastic modulus of the polypropylene fiber are both highest, so that the special cement concrete crack-resistant and seepage-resistant polypropylene mesh fiber prepared according to the material ratio in example 3 has better comprehensive performance.

Comparative example 1

The comparative example provides a special cement concrete anti-cracking and anti-seepage polypropylene reticular fiber, which comprises the raw materials of 50% of propylene, 5% of activating agent, 5% of catalyst, 20% of hydrogen and 10% of reinforcing agent.

In comparison with examples 1-4, the treatment agent was absent.

Comparative example 2

The comparative example provides a special cement concrete anti-cracking and anti-seepage polypropylene reticular fiber, which comprises the raw materials of 50% of propylene, 5% of an activating agent, 5% of a catalyst, 20% of hydrogen and 10% of a treating agent.

The enhancer was absent compared to examples 1-4.

Comparative example 3

The comparative example provides a special cement concrete anti-cracking and anti-seepage polypropylene reticular fiber, which comprises the raw materials of 50% of propylene, 25% of hydrogen, 5% of an activating agent, 5% of a catalyst, 5% of a reinforcing agent, 5% of a treating agent and 5% of epoxy resin.

Compared with the examples 1-4, the epoxy resin is added.

Comparative example 4

The comparative example provides a special cement concrete anti-cracking and anti-seepage polypropylene reticular fiber, which comprises the raw materials of 50% of propylene, 20% of hydrogen, 5% of an activating agent, 5% of a catalyst, 5% of a reinforcing agent, 10% of a treating agent and 5% of butyl rubber.

Butyl rubber was added as compared to examples 1-4.

The tensile strength and the elastic modulus of the special cement concrete anti-cracking and anti-seepage polypropylene reticular fiber prepared by the invention are in great relation with the reinforcing agent and the treating agent added into the special cement concrete anti-cracking and anti-seepage polypropylene reticular fiber, and in order to verify the related technical scheme, the applicant carries out the following tests:

comparative examples 1 to 2: by adopting the method of the embodiment 3, and under the condition of removing the reinforcing agent and the treating agent, the relevant indexes of the prepared special cement concrete anti-cracking anti-seepage polypropylene reticular fiber are detected, and the concrete indexes are shown in the table 2:

	tensile strength/Mpa	Modulus of elasticity/MPa
			Comparative example 1	580	2300
Comparative example 2	450	4000
			Example 3	620	4500

As shown in table 2, in comparative example 1, the elastic modulus of the special cement concrete anti-cracking and anti-seepage polypropylene reticular fiber is obviously reduced under the condition of removing the treating agent, in comparative example 2, the tensile strength of the special cement concrete anti-cracking and anti-seepage polypropylene reticular fiber is obviously reduced under the condition of removing the reinforcing agent, and the special cement concrete anti-cracking and anti-seepage polypropylene reticular fiber has obvious defects compared with example 3, so that the reinforcing agent and the treating agent are important factors for changing the tensile strength and the elastic modulus.

Comparative examples 3 to 4: by adopting the method of example 1, the prepared special cement concrete crack-resistant and seepage-proof polypropylene reticular fiber is detected under the condition of additionally adding epoxy resin and butyl rubber, and the concrete indexes are shown in table 3:

	tensile strength/Mpa	Modulus of elasticity/MPa
			Comparative example 3	565	3700
Comparative example 4	560	3660
			Example 1	561	3600

TABLE 3

According to the table 3, in the comparative examples 3-4, in the case of additionally adding the epoxy resin and the butyl rubber, the elastic modulus and the tensile strength of the special cement concrete crack-resistant and seepage-proof polypropylene mesh fiber are not obviously changed compared with the example 3, and therefore, the epoxy resin and the butyl rubber play a small role in changing the tensile strength and the elastic modulus.

Experimental example 1

The special cement concrete crack-resistant and seepage-proof polypropylene reticular fiber provided by the embodiments 1-4 and the comparative examples 1-4 is used for measuring the actual crack-resistant and seepage-proof time of the road surface, an open space is selected to construct 8 roads with equal length and equal thickness, each road adopts the polypropylene fiber provided by one embodiment or the comparative example, a vehicle is arranged on the road to drive and simulate the road in actual use, water is sprayed on the road surface every day to simulate actual rainfall, the crack condition of the road surface is observed and recorded every day, and the concrete data of the crack condition of the road surface after 100 days are as follows:

TABLE 4

As shown in Table 4, the cracking of the pavement in examples 1-4 is significantly better than that in comparative examples 1-2, and thus it can be seen that the crack resistance and penetration resistance of the cement concrete can be effectively improved by adding the reinforcing agent and the treating agent, and the cracking of the pavement can be similarly seen in examples 1 and comparative examples 3-4, and thus it can be seen that the effect of adding the epoxy resin and the butyl rubber is not significant, and thus only the reinforcing agent and the treating agent need to be added.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.