阅读说明：本技术 一种stc超高韧性混凝土配方及生产工艺 (STC ultra-high-toughness concrete formula and production process ) 是由 袁芬 芦向晶 曹浩鹏 王涛 曹鹤磊 邵琦 于 2019-09-03 设计创作，主要内容包括：本发明公开了一种STC超高韧性混凝土配方及生产工艺,由以下原料配比组成：水泥：60-70份；矿物掺合料：10-15份；粗集料：40-60份；细集料：20-30份；赤泥粉：25-30份；抗裂增韧剂：14-24份；钢纤维：10-15份；玻璃纤维：20-25份；不锈钢纤维：20-30份；聚乙烯醇纤维：15-20份；仿蜘蛛丝纤维：32-42份；高性能减水剂：7-9份；PH敏感水凝胶：18-22份；水：30-40份。该STC超高韧性混凝土配方及生产工艺,通过在混凝土的原料中,加入了抗裂增韧剂、钢纤维、玻璃纤维、不锈钢纤维、聚乙烯醇纤维与仿蜘蛛丝纤维,所加入的纤维与抗裂增韧剂,都为高强度、高韧性材料,从而大大的提高了混凝土的轻度和韧性,能很好的改善混凝土的工作性能,同时提高了自密实的强度,改善了收缩性能。(The invention discloses an STC ultra-high toughness concrete formula and a production process, which comprises the following raw materials in parts by weight: cement: 60-70 parts; mineral admixture: 10-15 parts; coarse aggregate: 40-60 parts; fine aggregate: 20-30 parts of a solvent; red mud powder: 25-30 parts; an anti-cracking toughening agent: 14-24 parts; steel fiber: 10-15 parts; glass fiber: 20-25 parts; stainless steel fiber: 20-30 parts of a solvent; polyvinyl alcohol fibers: 15-20 parts of a solvent; imitating spider silk fibers: 32-42 parts; high-performance water reducing agent: 7-9 parts; PH sensitive hydrogel: 18-22 parts; water: 30-40 parts. According to the STC ultra-high toughness concrete formula and the production process, the anti-cracking toughening agent, the steel fiber, the glass fiber, the stainless steel fiber, the polyvinyl alcohol fiber and the spider silk-like fiber are added into the raw materials of the concrete, and the added fiber and the anti-cracking toughening agent are high-strength and high-toughness materials, so that the lightness and the toughness of the concrete are greatly improved, the working performance of the concrete can be well improved, the self-compacting strength is improved, and the shrinkage performance is improved.)

1. An STC ultra-high toughness concrete formula is characterized in that: the feed is prepared from the following raw materials in parts by weight:

cement: 60-70 parts;

mineral admixture: 10-15 parts;

coarse aggregate: 40-60 parts;

fine aggregate: 20-30 parts of a solvent;

red mud powder: 25-30 parts;

an anti-cracking toughening agent: 14-24 parts;

steel fiber: 10-15 parts;

glass fiber: 20-25 parts;

stainless steel fiber: 20-30 parts of a solvent;

polyvinyl alcohol fibers: 15-20 parts of a solvent;

imitating spider silk fibers: 32-42 parts;

high-performance water reducing agent: 7-9 parts;

PH sensitive hydrogel: 18-22 parts;

water: 30-40 parts.

2. The STC ultra-high toughness concrete formulation of claim 1, wherein: the cement is Portland cement, and the steel fibers are superfine steel fibers.

3. The STC ultra-high toughness concrete formulation of claim 1, wherein: the mineral admixture is formed by mixing slag and fly ash, and the ratio of the slag to the fly ash is 1:1.

4. The STC ultra-high toughness concrete formulation of claim 1, wherein: the coarse aggregate is one of limestone and basalt.

5. The STC ultra-high toughness concrete formulation of claim 1, wherein: the fine aggregate is formed by mixing quartz sand, quartz powder and silica fume, and the ratio of the quartz sand to the quartz powder to the silica fume is 1:1.7: 0.4.

6. The STC ultra-high toughness concrete formulation of claim 1, wherein: the high-performance water reducing agent is a polycarboxylic acid high-performance water reducing agent, and the water reducing rate of the polycarboxylic acid high-performance water reducing agent is 20-40%.

7. The STC ultra-high toughness concrete formulation of claim 1, wherein: the anti-cracking toughening agent is a silicone-acrylic emulsion, and the solid content of the silicone-acrylic emulsion is 50-60%.

8. A production process of STC ultra-high toughness concrete is characterized in that: the production steps are as follows:

s1: taking out the slag and the fly ash according to the ratio of 1:1, screening the slag and the fly ash by a screen, and then putting the screened slag and the fly ash into a stirrer for stirring and mixing until the slag and the fly ash are uniformly mixed to prepare a mineral admixture, wherein the stirring time is 15-20 minutes;

s2: taking out quartz sand, quartz powder and silica fume according to the ratio of 1:1.7:0.4, screening the quartz sand, the quartz powder and the silica fume by using a screen, and putting the screened quartz sand, the quartz powder and the silica fume into a stirrer to be stirred and mixed until the quartz sand, the quartz powder and the silica fume are uniformly mixed to prepare fine aggregate, wherein the stirring time is 20-30 minutes;

s3: taking out the red mud raw material, drying the red mud raw material in a drying box at the temperature of 110 ℃, crushing and grinding the dried red mud, and sieving the ground red mud through a sieve with the size of 0.055mm to prepare red mud powder;

s4: taking 13 parts of steel fibers, 23 parts of glass fibers, 25 parts of stainless steel fibers, 17 parts of polyvinyl alcohol fibers, 27 parts of spider silk-like fibers and 15 parts of water, and putting the taken raw materials into an ultrasonic dispersion machine for dispersion to obtain a suspension A;

s5: taking out 13 parts of the mineral admixture prepared in the step S1, 25 parts of the fine aggregate prepared in the step S2, 27 parts of the red mud powder prepared in the step S3, 65 parts of cement, 50 parts of the coarse aggregate and all the remaining water, and putting all the taken-out raw materials into a stirrer for stirring;

s6: and (3) taking out the suspension A prepared in the step S4, taking out 19 parts of the anti-cracking toughening agent, 8 parts of the high-performance water reducing agent and 21 parts of the PH sensitive hydrogel, and sequentially pouring the suspension A, the anti-cracking toughening agent, the high-performance water reducing agent and the PH sensitive hydrogel into a stirrer when the raw materials are stirred in the step S5 until the raw materials are uniformly stirred, so that the ultra-high-toughness concrete is obtained.

Technical Field

The invention relates to the field of concrete, in particular to an STC ultra-high toughness concrete formula and a production process.

Background

The concrete is referred to as concrete: refers to the general name of engineering composite materials formed by cementing aggregate into a whole by cementing materials. The term concrete generally refers to cement as the cementing material and sand and stone as the aggregate; the cement concrete, also called as common concrete, is obtained by mixing with water (which may contain additives and admixtures) according to a certain proportion and stirring, and is widely applied to civil engineering. The cement concrete is a main material for national economic construction in China. With the increasing expansion of the application range of concrete, the problem of performance degradation of the concrete in the natural environment is gradually revealed. The common cement concrete has high compression strength and high rigidity, but has the characteristics of easy shrinkage cracking, low tensile strength, poor toughness and the like in the process of coagulation and hardening, and has more obvious brittleness characteristic along with the improvement of the strength, thereby bringing great influence on the durability of concrete structures.

However, the tensile strength of the concrete on the market is low, which is the weak point of the traditional concrete, and the concrete cracks under the tensile stress to affect the safety and durability of the structure. From the tensile property of concrete, the research on effective measures for improving the tensile strength and toughness of the concrete has important engineering significance.

Disclosure of Invention

The invention aims to provide an STC ultra-high-toughness concrete formula and a production process, and aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

an STC ultra-high toughness concrete formula is composed of the following raw materials in parts by weight:

cement: 60-70 parts;

mineral admixture: 10-15 parts;

coarse aggregate: 40-60 parts;

fine aggregate: 20-30 parts of a solvent;

red mud powder: 25-30 parts;

an anti-cracking toughening agent: 14-24 parts;

steel fiber: 10-15 parts;

glass fiber: 20-25 parts;

stainless steel fiber: 20-30 parts of a solvent;

polyvinyl alcohol fibers: 15-20 parts of a solvent;

imitating spider silk fibers: 32-42 parts;

high-performance water reducing agent: 7-9 parts;

PH sensitive hydrogel: 18-22 parts;

water: 30-40 parts.

As a further scheme of the invention: the cement is Portland cement, and the steel fibers are superfine steel fibers.

As a still further scheme of the invention: the mineral admixture is formed by mixing slag and fly ash, and the ratio of the slag to the fly ash is 1:1.

As a still further scheme of the invention: the coarse aggregate is one of limestone and basalt.

As a still further scheme of the invention: the fine aggregate is formed by mixing quartz sand, quartz powder and silica fume, and the ratio of the quartz sand to the quartz powder to the silica fume is 1:1.7: 0.4.

As a still further scheme of the invention: the high-performance water reducing agent is a polycarboxylic acid high-performance water reducing agent, and the water reducing rate of the polycarboxylic acid high-performance water reducing agent is 20-40%.

As a still further scheme of the invention: the anti-cracking toughening agent is a silicone-acrylic emulsion, and the solid content of the silicone-acrylic emulsion is 50-60%.

A production process of STC ultra-high toughness concrete comprises the following production steps:

s1: taking out the slag and the fly ash according to the ratio of 1:1, screening the slag and the fly ash by a screen, and then putting the screened slag and the fly ash into a stirrer for stirring and mixing until the slag and the fly ash are uniformly mixed to prepare a mineral admixture, wherein the stirring time is 15-20 minutes;

s2: taking out quartz sand, quartz powder and silica fume according to the ratio of 1:1.7:0.4, screening the quartz sand, the quartz powder and the silica fume by using a screen, and putting the screened quartz sand, the quartz powder and the silica fume into a stirrer to be stirred and mixed until the quartz sand, the quartz powder and the silica fume are uniformly mixed to prepare fine aggregate, wherein the stirring time is 20-30 minutes;

s3: taking out the red mud raw material, drying the red mud raw material in a drying box at the temperature of 110 ℃, crushing and grinding the dried red mud, and sieving the ground red mud through a sieve with the size of 0.055mm to prepare red mud powder;

s4: taking 13 parts of steel fibers, 23 parts of glass fibers, 25 parts of stainless steel fibers, 17 parts of polyvinyl alcohol fibers, 27 parts of spider silk-like fibers and 15 parts of water, and putting the taken raw materials into an ultrasonic dispersion machine for dispersion to obtain a suspension A;

s5: taking out 13 parts of the mineral admixture prepared in the step S1, 25 parts of the fine aggregate prepared in the step S2, 27 parts of the red mud powder prepared in the step S3, 65 parts of cement, 50 parts of the coarse aggregate and all the remaining water, and putting all the taken-out raw materials into a stirrer for stirring;

s6: and (3) taking out the suspension A prepared in the step S4, taking out 19 parts of the anti-cracking toughening agent, 8 parts of the high-performance water reducing agent and 21 parts of the PH sensitive hydrogel, and sequentially pouring the suspension A, the anti-cracking toughening agent, the high-performance water reducing agent and the PH sensitive hydrogel into a stirrer when the raw materials are stirred in the step S5 until the raw materials are uniformly stirred, so that the ultra-high-toughness concrete is obtained.

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

the invention adds the anti-crack flexibilizer, the steel fiber, the glass fiber, the stainless steel fiber, the polyvinyl alcohol fiber and the spider silk-like fiber into the raw materials of the concrete, the added fiber and the anti-crack flexibilizer are all high-strength and high-toughness materials, thereby greatly improving the lightness and the toughness of the concrete, well improving the working performance of the concrete, simultaneously improving the self-compaction strength, improving the shrinkage performance, and effectively preventing the drying shrinkage and cracking of the concrete, the ultra-high toughness concrete prepared by the method can effectively reduce the longitudinal rib stress, greatly improve the stress condition of a road surface, improve the integral rigidity of the road surface, reduce the deformation of the road surface and prolong the service life of the road surface, the red mud powder is added into the raw materials of the concrete, the red mud powder is the red mud, and the red mud has certain internal curing effect, is beneficial to improving the strength of the concrete and reducing the self-shrinkage performance of the concrete, therefore, the quality of concrete can be improved, the red mud is a byproduct generated in the production process of an alumina plant, belongs to waste, has low cost, realizes reutilization of the waste, and is beneficial to environmental protection.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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.