阅读说明：本技术 一种绿色环保的节能型水泥及其制备方法 (Environment-friendly energy-saving cement and preparation method thereof ) 是由 龙包平 于 2021-09-24 设计创作，主要内容包括：本发明提供了一种绿色环保的节能型水泥,通过对废旧玻璃进行改性处理,并与其他组分相互配合,可以将废旧玻璃作为水泥的原料之一制备环保水泥,由此制备的混凝土具有良好的力学性能。本发明还提供了所述水泥的制备方法。(The invention provides environment-friendly energy-saving cement, which is prepared by modifying waste glass and matching with other components, wherein the waste glass is used as one of raw materials of the cement to prepare environment-friendly cement, and the prepared concrete has good mechanical properties. The invention also provides a preparation method of the cement.)

1. The green environment-friendly energy-saving cement is characterized in that the cement raw materials comprise ordinary portland cement, modified waste glass powder, triethanolamine and triisopropanolamine;

the preparation method of the modified waste glass powder comprises the following steps:

step one, cleaning, crushing and drying waste glass to obtain waste glass powder;

adding waste glass powder, toluene and a silane coupling agent into a reactor provided with a condensation reflux device, starting stirring, controlling the temperature of the reactor at 100-110 ℃, heating for 10-12 hours, discharging, washing with absolute ethyl alcohol, and drying to obtain the modified waste glass powder;

the preparation method of the silane coupling agent comprises the following steps: adding potassium methacrylate, toluene, a catalyst and a polymerization inhibitor into a reactor provided with a condensation reflux device under the nitrogen atmosphere, starting stirring, controlling the temperature of the reactor to be 100-115 ℃, then dropwise adding chloromethyl trimethoxy silane, reacting for 10-12 hours, filtering, distilling under reduced pressure, and collecting 110-115 ℃/10kpa of fraction to obtain the silane coupling agent;

the mass ratio of the triethanolamine to the triisopropanolamine is 4-5: 1.

2. the cement according to claim 1, wherein in step one of the preparation method of the modified waste glass powder, the particle size of the waste glass powder is not higher than 100 μm, preferably not higher than 75 μm.

3. The cement according to claim 1, wherein in the second step of the preparation method of the modified waste glass powder, the following components are calculated according to the relative parts by mass:

the using amount of the waste glass powder is 100 parts by mass;

the using amount of the toluene is 80-120 parts by mass;

the amount of the silane coupling agent is 8-12 parts by mass.

4. The cement according to claim 1, wherein in the preparation method of the silane coupling agent, the silane coupling agent is prepared by the following components in parts by mass:

the using amount of the potassium methacrylate is 20 parts by mass;

the dosage of the toluene is 180-200 parts by mass;

the amount of the catalyst is 0.5-1 part by mass;

the amount of the polymerization inhibitor is 0.5-1 part by mass;

the amount of chloromethyl trimethoxy silane is 30-35 parts by mass.

5. The cement of claim 1, wherein the catalyst is tetrabutylammonium bromide and the polymerization inhibitor is N, N' -bis (2-naphthyl) p-phenylenediamine.

6. The cement according to claim 1, characterized in that the following components are in relative parts by mass:

the dosage of the ordinary portland cement is 200-250 parts by mass;

the using amount of the modified waste glass powder is 20-25 parts by mass;

the amount of the triethanolamine is 4-5 parts by mass;

the amount of triisopropanolamine is 1 part by mass.

7. The method for preparing cement according to any one of claims 1 to 6, wherein the ordinary portland cement, the modified waste glass powder, the triethanolamine and the triisopropanolamine are added into a ball mill for grinding, and the cement is obtained after grinding.

8. The method for preparing cement according to claim 7, wherein the grinding time is 0.5 to 1 hour.

Technical Field

The invention relates to green and environment-friendly energy-saving cement and a preparation method thereof.

Background

At present, glass is widely applied to the fields of buildings, medical treatment, daily use, electronics and the like. The process of producing glass is also the process of generating waste glass, and the treatment method of the waste glass mainly comprises landfill and recycling. The disposal cost of the landfill waste glass is very expensive, not only the land used is occupied, but also the landfill glass is very difficult to degrade, and the environmental pollution is caused. The waste glass is recycled and reused in the cement industry, so that the problems can be effectively solved, and the current situation of the cement concrete industry can be improved, so that the waste glass is inevitably recycled. However, the direct application of the waste glass to cement may result in insufficient connection strength between the components during the curing process of the concrete, which means that the strength of the concrete is difficult to meet the requirements of actual production and life.

Therefore, it is necessary to provide a cement which can recycle waste glass and has good performance so as to solve the problems in the prior art.

Disclosure of Invention

The invention provides environment-friendly energy-saving cement, which is prepared by modifying waste glass and matching with other components, wherein the waste glass is used as one of raw materials of the cement to prepare environment-friendly cement, and the prepared concrete has good mechanical properties. The invention also provides a preparation method of the cement.

The above purpose of the invention is realized by the following technical scheme:

the green and environment-friendly energy-saving cement comprises raw materials of ordinary portland cement, modified waste glass powder, triethanolamine and triisopropanolamine;

the preparation method of the modified waste glass powder comprises the following steps:

step one, cleaning, crushing and drying waste glass to obtain waste glass powder;

adding waste glass powder, toluene and a silane coupling agent into a reactor provided with a condensation reflux device, starting stirring, controlling the temperature of the reactor at 100-110 ℃, heating for 10-12 hours, discharging, washing with absolute ethyl alcohol, and drying to obtain the modified waste glass powder;

the preparation method of the silane coupling agent comprises the following steps: adding potassium methacrylate, toluene, a catalyst and a polymerization inhibitor into a reactor provided with a condensation reflux device under the nitrogen atmosphere, starting stirring, controlling the temperature of the reactor to be 100-115 ℃, then dropwise adding chloromethyl trimethoxy silane, reacting for 10-12 hours, filtering, distilling under reduced pressure, and collecting 110-115 ℃/10kpa of fraction to obtain the silane coupling agent;

the mass ratio of the triethanolamine to the triisopropanolamine is 4-5: 1.

the waste glass is crushed and ground, and the surface of the glass powder is treated by a special silane coupling agent in toluene, wherein the special silane coupling agent is obtained by the reaction of potassium methacrylate and chloromethyl trimethoxy silane. The special silane coupling agent has a proper spatial structure, has good adsorbability or connectivity to the waste glass powder, and is beneficial to improving the binding capacity of the waste glass powder and other components. The green environment-friendly cement is obtained by mixing the waste glass powder subjected to surface treatment with ordinary portland cement, triethanolamine and triisopropanolamine, so that the mechanical property of the concrete can reach a level not lower than that of the conventional material when the cement is applied to the preparation of the concrete. In addition, the weight ratio of the triethanolamine to the triisopropanolamine is controlled, and the triethanolamine to the triisopropanolamine are matched with other components, so that the finally prepared concrete has better strength in the early stage and the later stage.

In the first step of the preparation method of the modified waste glass powder, the particle size of the waste glass powder is not higher than 100 μm, preferably not higher than 75 μm.

The particle size of the waste glass powder is limited within the optimal range, so that the raw materials of the cement can be promoted to be uniformly mixed, and the mechanical property of the final concrete can be improved.

In the second step of the preparation method of the modified waste glass powder, the following components are calculated according to relative parts by mass:

the using amount of the waste glass powder is 100 parts by mass;

the using amount of the toluene is 80-120 parts by mass;

the amount of the silane coupling agent is 8-12 parts by mass.

In the preparation method of the silane coupling agent, the following components are calculated according to relative parts by mass:

the using amount of the potassium methacrylate is 20 parts by mass;

the dosage of the toluene is 180-200 parts by mass;

the amount of the catalyst is 0.5-1 part by mass;

the amount of the polymerization inhibitor is 0.5-1 part by mass;

the amount of chloromethyl trimethoxy silane is 30-35 parts by mass.

The catalyst is tetrabutylammonium bromide, and the polymerization inhibitor is N, N' -di (2-naphthyl) p-phenylenediamine.

The adhesive comprises the following components in parts by weight:

the dosage of the ordinary portland cement is 200-250 parts by mass;

the using amount of the modified waste glass powder is 20-25 parts by mass;

the amount of the triethanolamine is 4-5 parts by mass;

the amount of triisopropanolamine is 1 part by mass.

The preferable technical scheme of the invention limits the dosage of each raw material of the cement, and aims to increase the dosage of the waste glass powder as much as possible under the condition of ensuring that the mechanical property of the finally prepared concrete reaches the level capable of being industrially applied.

A preparation method of the cement comprises the following steps: and adding the ordinary portland cement, the modified waste glass powder, triethanolamine and triisopropanolamine into a ball mill for grinding, and obtaining the cement after grinding.

Preferably, the grinding time is 0.5-1 hour.

It should be noted that the content of the present invention which is not described can be performed by referring to the technical solutions commonly used in the art, and the implementation of the present invention is not affected.

The invention has the beneficial effects that: the waste glass powder is modified by a special silane coupling agent, the binding performance of the waste glass powder and other components in cement is improved, and the waste glass powder is used together with triethanolamine and triisopropanolamine, so that the adverse effect of the glass powder on the hydration reaction of the cement is reduced in the process of preparing the concrete, and the concrete is ensured to have good early-stage and later-stage strength.

Detailed Description

The invention is further illustrated by the following specific examples. Reagents, methods and apparatus used in the present invention are conventional in the art unless otherwise indicated.

The examples and comparative examples used the following starting materials:

P.O 42.5 Portland cement, Shandong landscape cement group, Inc.;

ISO standard sand of china, xiamen eisiou gull standard sand company;

waste glass and recycled green waste glass beer bottles.

The preparation method of the silane coupling agents 1 and 2 comprises the following steps: under the atmosphere of nitrogen, adding potassium methacrylate, toluene, tetrabutylammonium bromide and N, N' -di (2-naphthyl) p-phenylenediamine into a reactor provided with a condensation reflux device, starting stirring, controlling the temperature of the reactor at 100 ℃, then dropwise adding chloromethyltrimethoxysilane, reacting for 12 hours, filtering, distilling under reduced pressure, and collecting 110-115 ℃/10kpa of fraction to obtain the silane coupling agent.

The amounts of the respective raw materials used in the preparation method of the silane coupling agent are listed in table 1 in terms of relative parts by mass between the respective components.

TABLE 1 preparation methods of silane coupling agent the amounts of the respective raw materials (parts by mass)

Categories	Silane coupling agent 1	Silane coupling agent 2
			Potassium methacrylate	20	20
Toluene	180	200
			Tetrabutylammonium bromide	0.5	1
N, N' -di (2-naphthyl) p-phenylenediamine	0.5	1
			Chloromethyl trimethoxy silane	30	35

The preparation method of the modified waste glass powder 1 and 2 and the comparative waste glass powder 1 and 2 comprises the following steps:

step one, cleaning and crushing waste glass, screening the waste glass by a 1mm sieve to obtain glass particles, grinding the glass particles by a ball mill, screening the glass particles by a sieve of 75 microns, and drying to obtain waste glass powder;

and step two, adding waste glass powder, toluene (compared with the waste glass powder 1, deionized water is replaced by the deionized water), and a silane coupling agent (compared with the waste glass powder 2, no silane coupling agent is added), starting stirring, controlling the temperature of the reactor at 100 ℃ (compared with the waste glass powder 2, controlling the temperature at 80 ℃), heating for 10 hours, discharging, washing with absolute ethyl alcohol, drying, and discharging.

The amount of each raw material in the second step of the preparation method of the modified waste glass powder is listed in table 2, and is calculated by the relative mass parts of each component.

TABLE 2 modified or comparative raw material amounts (parts by mass) in step two of the waste glass powder preparation method

Examples and comparative examples cement sample preparation methods: adding the ordinary Portland cement, the modified waste glass powder (the comparative waste glass powder is not added in the comparative example), triethanolamine (if any) and triisopropanolamine (if any) into a ball mill for grinding, and obtaining a cement sample after grinding, wherein the grinding time is 1 hour.

Examples and comparative examples cement sample preparation methods the amounts of the respective raw materials are listed in table 3 in relative parts by mass between the respective components.

Table 3 examples and comparative examples cement sample preparation methods the amounts (parts by mass) of respective raw materials

Examples and comparative examples preparation of concrete samples: and (2) uniformly mixing 10 parts by mass of concrete samples of examples or comparative examples, 30 parts by mass of Chinese ISO standard sand and 5 parts by mass of mixing water, adding the mixture into a mold, and respectively preparing concrete samples of corresponding examples or comparative examples.

The concrete samples obtained in the examples and comparative examples were cured for 3 days, 7 days and 28 days, respectively, and tested according to test standard GB/T17671-1999. The test results are shown in Table 4.

Table 4 test results of examples and comparative examples

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.