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Fiber-hybrid high-ductility cement-based composite material and preparation method thereof

A composite material and cement-based technology, which is applied in the field of fiber-reinforced cement-based composite materials and cement-based composite materials, can solve the problems of increasing material production energy consumption, reducing material preparation efficiency, and time-consuming preparation process, so as to shorten preparation time, The effect of low cost and simple preparation process

Active Publication Date: 2014-03-26
SINOMA INT ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The material preparation process is time-consuming and energy-consuming, and the stirring time is as long as 80-120 minutes, which greatly reduces the preparation efficiency of the material and increases the energy consumption of the material production

Method used

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  • Fiber-hybrid high-ductility cement-based composite material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The weight ratio of cement, mineral admixture, fine aggregate, fiber, water and admixture is: 24.7%:32.9%:24.7%:1.17%:16.5%:0.19%. The mix ratio uses polypropylene fiber and glass fiber, and the weight ratio of the two fibers is: 63.6%:36.4%. Add the weighed cement, mineral admixture and fine aggregate into the mixer and dry mix for 2 minutes; dissolve the admixture in water, then slowly add them into the mixing bucket and stir for 5 minutes; sprinkle the fiber into the mixing bucket Inside, stir for another 7 minutes.

[0035] The mineral admixture is fly ash; the fine aggregate is mixed with quartz stone powder and river sand in a weight ratio of 1:1; the admixture is made of polycarboxylate high-performance water reducer And polyacrylic acid thickener composition.

[0036] The material properties after 28 days are as follows: the tensile strength is 4.0MPa, the ultimate elongation is 3.2%, the flexural strength is 10.3MPa, and the compressive strength is 50.5MPa. ...

Embodiment 2

[0038]The weight ratio of cement, mineral admixture, fine aggregate, fiber, water and admixture is: 40.8%:24.5%:16.8%:1.29%:16.3%:0.37%. The mixing ratio uses polypropylene fiber, polyvinyl alcohol fiber and glass fiber, and the weight ratio of the three fibers is: 53.7%:25.8%:20.5%. Add the weighed cement, mineral admixture and fine aggregate into the mixer, and dry mix for 2 minutes; dissolve the admixture in water, then slowly add them into the mixing bucket, and stir for 6 minutes; sprinkle the fiber into the mixing bucket Inside, stir for another 10 minutes.

[0039] The mineral admixture is made by mixing fly ash and silica fume in a weight ratio of 8:1; the fine aggregate is quartz stone powder; the admixture is made of polycarboxylate high-performance water reducer And polyacrylic acid thickener composition.

[0040] The material properties after 28 days are as follows: the tensile strength is 6.3MPa, the ultimate elongation is 1.9%, the flexural strength is 17.9MPa,...

Embodiment 3

[0042] The weight ratio of cement, mineral admixture, fine aggregate, fiber, water and admixture is: 33.5%:31.3%:18.4%:1.4%:14.6%:0.8%. The mixing ratio uses polypropylene fiber and polyethylene fiber, and the weight ratio of the two fibers is: 48.4%:51.6%. Add the weighed cement, mineral admixture and fine aggregate into the mixer and dry mix for 3 minutes; dissolve the admixture in water, then slowly add them into the mixing bucket and stir for 8 minutes; sprinkle the fiber into the mixing bucket Inside, stir for another 8 minutes.

[0043] The mineral admixture is formed by mixing finely ground slag powder and silica fume in a weight ratio of 10:1; the fine aggregate is formed by mixing limestone powder and river sand in a weight ratio of 2:5; the The admixture described above is composed of polycarboxylate high-performance water reducer and polyacrylic acid thickener.

[0044] The properties of the material after 28 days are as follows: the tensile strength is 6.8MPa, th...

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Abstract

The invention provides a high-ductility cement-based composite material. The high-ductility cement-based composite material is prepared with the following raw materials by weight: 71.8-85 parts of base material, 12.9-25.2 parts of water, 0.89-2.67 parts of fiber and 0.11-1.23 parts of admixture, wherein the fiber is composed of two or more of polypropylene fiber, polyvinyl alcohol fiber, polyethylene fiber, aromatic polyamide fiber and glass fiber; the weight ratio between the polypropylene fiber, the polyvinyl alcohol fiber, the polyethylene fiber, the aromatic polyamide fiber and the glass fiber, and the total fiber is 15-89.5%, 0-68.4%, 0-75.6%, 0-73.5%, and 0-56.4% respectively. The high-ductility cement based composite material is high in compressive strength and low in preparation cost; the compressive strength can be up to higher than 50.5 MPa; the preparation cost is reduced to 15-50% of that of the prior art. The invention further provides a preparation method of the high-ductility cement based composite material.

Description

technical field [0001] The invention belongs to the field of building materials, in particular to a cement-based composite material, more specifically to a fiber-reinforced cement-based composite material, and a preparation method thereof. Background technique [0002] High-ductility cement-based composite material is a fiber-reinforced cement-based composite material that exhibits high ductility under tensile, bending, and shear loads. The ultimate elongation rate is as high as 3%, which is hundreds of times that of ordinary concrete and fiber concrete. The invention and application of cement have changed the traditional concept that "cement-based materials are quasi-brittle materials". Compared with ordinary concrete and fiber reinforced concrete, high ductility cement-based composite materials have greater advantages in terms of seismic load resistance, impact load resistance, shear load resistance, fatigue load resistance and durability. Provide technical support and ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B16/06C04B14/42
CPCY02A30/30
Inventor 隋同波周健张利俊陈智丰李晋梅刘淼李菁吴晓丽王彬
Owner SINOMA INT ENG
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