C80 concrete prepared from stone chips

A technology of concrete and stone chips, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of unfavorable environmental protection and sustainable development of building materials, high fluidity water demand, large particle gaps, etc., to achieve Conducive to environmental protection and sustainable development, improve the gel compactness, the effect of huge economic benefits

Inactive Publication Date: 2021-01-29
翁源县安和混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Existing concrete has many deficiencies, for example: 1. The particle gap is large, the gel density is not enough, it is not easy to disperse, and it requires more water to achieve the same fluidity;
[0006] 2. The crack resistance of concrete is not enough;
[0007] 3. The lack of high-quality fly ash in the preparation of high-performance concrete;
[0008] 4. The existing configuration method is not conducive to the environmental protection and sustainable development of building materials

Method used

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  • C80 concrete prepared from stone chips
  • C80 concrete prepared from stone chips
  • C80 concrete prepared from stone chips

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A C80 concrete prepared with stone chips, the preparation materials of the concrete include cementitious material, coarse aggregate, water reducer, water and high calcium stone chips, the average particle size of the stone chips is less than 4.75mm, and the high After secondary processing, calcium stone chips have a fineness modulus of 3.0-2.7, and other indicators meet the requirements for preparing C80 high-strength and high-performance concrete; the high-calcium stone chips include 1.5% of stone powder with a particle size below 0.08 μm, so The said stone powder has a filling effect of volcanic ash, which can replace part of the fly ash; the said cementing material includes cement, slag powder, fly ash and silica fume, and the cement is P.Ⅱ52.5 grade Portland cement, and the measured 28d strength is not low At 58Mpa, the slag powder is granulated blast furnace slag powder of S95 grade, the fly ash is grade I fly ash, and the silicon powder is made of highly active amo...

Embodiment 1 80

[0032] Table 1 Embodiment 1 C80 concrete mix ratio

[0033]

[0034] The concrete mixture tested with this mixing ratio has initial setting time of 5.75h, final setting time of 7.75h, slump of 180mm, slump loss of 20mm in 60min, compressive strength R3=73.2Mpa, R7=84.0Mpa, R28= 99.6 MPa.

[0035] The C80 concrete prepared by stone chips provided in Example 1 is suitable for the situation where there is not much lack of fly ash. It can be prepared with a strength grade of C80 and below, and the 56d chloride ion diffusion coefficient is less than 2.8×10 -12 m 2 / s, high performance concrete with excellent workability, crack resistance and durability.

Embodiment 2

[0037] A C80 concrete prepared with stone chips, the concrete preparation materials include cementitious material, coarse aggregate, water reducer, water and high-calcium stone chips, the types and properties of each raw material described in this embodiment are the same as those in the embodiment One is basically the same, the difference is that in this embodiment, slag powder is used instead of fly ash, and the cementitious material includes cement, slag powder and silicon powder.

[0038] In embodiment two, the amount of the gelling material is 595kg / m 3 , the water-binder ratio is 0.23, slag powder accounts for 17% of the total amount of the cementitious material, silicon powder accounts for 4.2% of the total weight of the cementitious material, and the dosage of the water reducer is 1.8% of the total weight of the cementitious material. The C80 The mass proportion of each material in concrete preparation is: m (cement): m (slag powder): m (silicon powder): m (high calcium...

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Abstract

The invention discloses C80 concrete prepared from stone chips, the preparation materials of the concrete comprise a cementing material, coarse aggregate, a water reducing agent, water and high-calcium stone chips, the dosage of the cementing material is 580-600kg/m < 3 >, and the water-binder ratio is 0.22-0.26. The C80 concrete has the beneficial effects that the stone chips with the average particle size of less than 4.75 mm are adopted, and stone powder contained in the stone chips can fill cement particle gaps; the gel compactness is improved, the surface energy is relatively low, the dispersion is easy, and the water requirement for achieving the same liquidity is low; the problem of lack of high-quality fly ash can be solved by blending ultrafine stone powder in the stone chips andslag powder to prepare high-performance concrete; river sand is replaced with the stone chips of mine production stone to serve as fine aggregate, the problem that no high-quality river sand is used for preparing high-strength concrete in mountainous areas is solved, environmental protection and sustainable development of building materials are facilitated, and huge economic benefits are achieved.

Description

technical field [0001] The invention belongs to the field of building materials, in particular to C80 concrete prepared from waste stone chips. Background technique [0002] Concrete is the most widely used building material and plays a pivotal role in construction projects. With the advancement of concrete technology, high-performance concrete with low water-binder ratio, low cement consumption, and low water consumption per unit volume as the main technical features is being constructed on the basis of high-performance water-reducing agents and large-volume mineral admixtures. The application in engineering is more and more extensive. [0003] Natural sand is generally used as fine aggregate for concrete preparation, but at present, the production of high-quality natural river sand that can be used for high-performance concrete in my country is seriously insufficient, and the distribution of production areas is uneven. In addition, my country's current environmental prote...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B18/12C04B18/14
CPCC04B18/12C04B18/141C04B28/04C04B2201/50C04B18/146C04B18/08C04B2103/302C04B22/002Y02W30/91
Inventor 沈庆兰
Owner 翁源县安和混凝土有限公司
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