Composite admixture for improving durability of common concrete by improving gradation

A composite admixture and ordinary concrete technology, applied in the field of building materials, can solve the problems of not considering the durability of admixture concrete, lack of concrete durability, etc., and achieve the effects of good market prospects, improved durability, and wide use.

Active Publication Date: 2019-06-07
广东新业混凝土有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, they did not consider that the admixture itself can further enhance the durability of concrete by improving the grading and compound excitation, and more fully play the role of various admixtures
[0004] In summary, the prior art still lacks a composite admixture that further improves the durability of concrete by improving the admixture gradation and composite excitation.

Method used

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  • Composite admixture for improving durability of common concrete by improving gradation
  • Composite admixture for improving durability of common concrete by improving gradation
  • Composite admixture for improving durability of common concrete by improving gradation

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0045] (1) Prepare the concrete raw materials of the following raw materials for use:

[0046] (2) Production grading: Sieve the fly ash according to 0-10um, 10-20um, 20-30um, 30-45um, 45-60um, collect after sieving for use; ball mill the limestone powder, and then Sieve 0-20um, 20-30um, 30-45um, collect after sieving for use; ball mill the slag powder, then sieve according to 0-15um, 15-30um, 30-45um, collect after sieving Use; ball mill the ceramic powder, then sieve according to 0-20um, 20-30um, 30-45um, collect after sieving for use; ball mill the volcanic ash, and then sieve according to 0-20um, 20-30um, 30-45um , 45-120um for sieving, and collect after sieving for use;

[0047] (3) Preparation of admixture: mechanically mix 1500g of fly ash, 2000g of limestone powder, 500g of slag powder, 500g of ceramic powder, 500g of pozzolan, and 50g of silica fume, wherein the gradation of fly ash is 0-10um 30%, 10-20um accounts for 35%, 20-30um accounts for 25%, 30-45um accounts ...

preparation Embodiment 2

[0049] This example only describes the differences from Example 1, and the gradation of the admixture in this preparation example is different.

[0050] (3) Preparation of admixture: 1500g of fly ash, 2000g of limestone powder, 500g of slag powder, 500g of ceramic powder, 500g of pozzolan, and 50g of silica fume are mechanically mixed, wherein, wherein, the gradation of fly ash is 0-10um Accounted for 40%, 10-20um accounted for 25%, 20-30um accounted for 20%, 30-45um accounted for 10%, 45-60um accounted for 5%; the gradation of limestone powder is 0-20um accounted for 60% , 20-30um accounted for 30%, 30-45um accounted for 10%; the gradation of slag powder was 0-15um accounted for 35%, 15-30um accounted for 45%, 30-45um accounted for 20%; ceramic powder The gradation of 0-20um accounts for 40%, 20-30um accounts for 40%, 30-45um accounts for 20%, the gradation of volcanic ash is 0-20um accounts for 20%, 20-30um accounts for 28%, 30- 45um accounts for 27%, and 45-120um accounts ...

Embodiment 3

[0052] This example only describes the differences from Example 1, and the gradation of the admixture in this preparation example is different.

[0053] (3) Preparation of admixture: mechanically mix 1500g of fly ash, 2000g of limestone powder, 500g of slag powder, 500g of ceramic powder, 500g of pozzolan, and 50g of silica fume, wherein the gradation of fly ash is 0-10um 25%, 10-20um accounts for 35%, 20-30um accounts for 25%, 30-45um accounts for 10%, 45-60um accounts for 5%; the gradation of limestone powder is 0-20um accounts for 65%, 20 -30um accounted for 28%, 30-45um accounted for 7%; the gradation of slag powder was 0-15um accounted for 30%, 15-30um accounted for 50%, 30-45um accounted for 20%; the gradation of ceramic powder 0-20um accounts for 40%, 20-30um accounts for 40%, 30-45um accounts for 20%, the gradation of volcanic ash is 0-20um accounts for 20%, 20-30um accounts for 30%, 30-45um accounts for 20% 25%, 45-120um accounted for 25%, homogenized after mixing, y...

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Abstract

The invention discloses a composite admixture for improving durability of common concrete by improving gradation. The composite admixture is prepared from the following raw materials in parts by weight: 150-250 parts of fly ash, 200-350 parts of limestone powder, 50-250 parts of slag powder, 50-250 parts of ceramic powder, 50-250 parts of volcanic ash and 0-50 parts of gypsum. By improving the gradation of the fly ash, the limestone powder, the slag powder, the ceramic powder and the volcanic ash, proper fluidity can be provided for the concrete, the porosity is reduced, the compactness of a system can be improved, and the use amount of water can be reduced, so that the durability of the concrete is further improved. Physical/chemical super-superposition effects can be generated through compounding and excitation of various admixtures, and the comprehensive effect of the mineral admixtures is superior to the sum of the individual use of the mineral admixtures. By using the mineral admixture compounded according to a proper proportion, the pore structure of the concrete is improved, the compactness of the concrete is improved, and the durability of the concrete is improved.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a composite admixture which improves the durability of ordinary concrete by improving gradation. Background technique [0002] Composite admixture refers to the use of two or more mineral materials that are separately ground to a specified fineness and then mixed in a certain proportion, or two or more mineral materials are mixed in a certain proportion and then powdered. Grinding powder materials to specified fineness. The interaction of cementitious materials in the mixing process produces effects such as induced activation, surface microcrystallization and interface coupling, so that the added composite mineral admixture can effectively improve the workability of concrete and the compactness, strength and durability of hardened concrete sex. However, due to the lack of systematic theoretical guidance on the preparation and application of mineral admixtures, there are still ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B22/14C04B28/02
Inventor 张炜梁晓彤胡一智阮家铭黄宁宁李龙卢军宇林震
Owner 广东新业混凝土有限公司
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