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A kind of reactive powder concrete mixed with waste glass powder and its preparation method

A technology of waste glass powder and reactive powder, applied in the field of concrete, can solve the problems of high temperature curing of reactive powder concrete, and achieve the effects of accelerating strength growth, accelerating hardening and promoting hydration reaction

Active Publication Date: 2022-02-18
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing active powder concrete requires high temperature curing, and to provide an active powder concrete mixed with waste glass powder and its preparation method, which can obtain high-strength concrete after short-term curing at room temperature

Method used

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  • A kind of reactive powder concrete mixed with waste glass powder and its preparation method
  • A kind of reactive powder concrete mixed with waste glass powder and its preparation method
  • A kind of reactive powder concrete mixed with waste glass powder and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0045] The active powder concrete mixed with waste glass powder according to the present invention comprises by weight: 450-810 parts of cement, 160-240 parts of silica fume, 35-240 parts of waste glass powder, 1200-1250 parts of silica sand, and 50 parts of water reducing agent. ~60 parts, 18~30 parts of high-efficiency dispersant, 100~150 parts of steel fiber, 158~200 parts of water, 10~20 parts of activity stimulating agent.

[0046] Its preparation method is as figure 1 As shown in the flow chart, it includes the following steps:

[0047] (1) First, measure and batch according to the ratio shown in Table 1, stir the silica sand of three types of particle sizes evenly in the mixer; mix cement, silica fume, waste glass powder, active activator and silty After the water reducer is mixed and stirred, it is poured into a mixer for dry mixing with uniform silica sand, and the mixture is evenly stirred to obtain a dry mixture;

[0048] The cement in Table 1 is P.O42.5R cement; ...

Embodiment 2

[0064] According to the weight ratio shown in Tables 3 and 4, metering and batching, using the same preparation method as in Example 1, the active powder concrete mixed with waste glass powder was prepared, and its properties are shown in Table 5.

[0065] Table 3. Embodiment 2 active powder concrete proportioning (by weight)

[0066]

[0067] Table 4. Embodiment 2 active powder concrete raw material properties

[0068]

[0069]

[0070] Table 5. Embodiment 2 active powder concrete properties

[0071] serial number 90d compressive strength / MPa 90d tensile strength / MPa Fluidity of the mixture 90d burst temperature / ℃ Example 2-1 190.3 31.2 228 636 Example 2-2 179 29.1 242 628 Example 2-3 193 32.7 231 704 Example 2-4 191.4 32.9 231.5 712 Example 2-5 189.6 32.1 237 693

[0072] It can be seen from Table 5 that there is no special rule between the performance of concrete and the physical properties of raw ...

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Abstract

The invention provides an active powder concrete mixed with waste glass powder and a preparation method thereof. The active powder concrete comprises the following raw materials in parts by weight: 450-810 parts of cement, 160-240 parts of silica fume, 35-240 parts of waste glass powder, 1200-1250 parts of silica sand, 50-60 parts of water reducing agent, 18-30 parts of high-efficiency dispersant, 100-150 parts of steel fiber, 158-200 parts of water, 10-20 parts of active activator, and the particle size range of waste glass powder 50-80um, the specific surface area ranges from 400-540m 2 / kg, its main chemical composition includes by weight ratio: SiO 2 65%~70%,Na 2 O 10%~15%, CaO 9%~10%, Al 2 o 3 3% to 4%, MgO 1% to 2%. The invention utilizes the high content of alkali contained in the waste glass powder to accelerate the hydration reaction after mixing with cement, silica powder, silica sand, steel fiber, etc., further improves the "volcanic ash activity" of the waste glass powder, and produces more The high heat of hydration enables concrete to use its own internal heat to promote hydration reaction at room temperature and accelerate hardening and strength growth.

Description

technical field [0001] The invention belongs to the technical field of concrete, in particular to an active powder concrete mixed with waste glass powder and a preparation method thereof. Background technique [0002] Reactive powder concrete is an ultra-high-strength and toughened concrete produced from active powder materials such as cement and mineral admixtures, fine aggregate, admixtures, high-strength micro-steel fibers and / or organic synthetic fibers, and water. defects, improve the internal microstructure of concrete, and obtain superior properties such as ultra-high strength, high toughness, high durability, and volume stability under steam curing or hot water curing conditions. [0003] Waste glass is mainly produced by discarding flat glass such as doors and windows of buildings and automobiles, glass containers, etc., and can be seen everywhere in municipal solid waste. The main way to deal with waste glass is landfill, which occupies land resources and is not b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B14/22
CPCC04B28/04C04B14/22C04B2201/50
Inventor 焦楚杰李松
Owner GUANGZHOU UNIVERSITY
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