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Submicron active mixed material and preparation method thereof

A kind of active mixed material and sub-micron technology, applied in the field of building materials, can solve the problems of uneven mixing of fine powder, easy moisture absorption and accumulation, easy to produce shrinkage, etc., achieve low price, excellent crack resistance, and improve utilization efficiency Effect

Active Publication Date: 2019-08-16
CNBM ZHONGYAN TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Yin Qi et al. found that the limestone after ultra-fine grinding (30% of the particles below 1 μm) was in a high-energy state when studying alkali-induced low-grade limestone cementitious materials, and it was easy to absorb moisture and accumulate. Shrinkage, and easy to introduce pores in cement mortar

Method used

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  • Submicron active mixed material and preparation method thereof

Examples

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preparation example Construction

[0028] The preparation method of submicron active mixed material in the embodiment comprises the following steps:

[0029] 1) take each raw material by weight percentage;

[0030] 2) Add each raw material to a high-efficiency ball mill, add grinding aids for ultrafine grinding to a specified particle size;

[0031] 3) Mix the ground powder evenly and pack it into the warehouse.

[0032] The embodiment and the comparative example were carried out the mortar experiment to measure the mechanical properties, and the shrinkage rate of the specimen was measured, and the cement used in the test was P.O42.5 grade ordinary Portland cement. For ease of recording, the particle size of A μm in the examples indicates that the maximum particle size of the raw material is A μm, for example, 0.4 μm marble stone powder indicates that the maximum particle size of marble stone powder is 0.4 μm.

Embodiment 1

[0034] The composition of the submicron active mixture is: 0.4μm marble stone powder 50%, 0.6μm basalt stone powder 13.5%, 0.5μm bauxite 15%, 0.4μm dihydrate gypsum 20%, NaOH 1.5%. Glue experiment.

Embodiment 2

[0036] The composition of the submicron active mixed material is: 60% of 0.2μm limestone powder, 10% of 0.4μm quartz stone powder, 10% of 0.5μm bauxite, 19% of 0.6μm anhydrite, Na 2 SiO 3 1%, the mixed material replaces 20% cement for mortar experiment.

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Abstract

The invention relates to the technical field of building materials, in particular to a submicron active mixed material for a cement-based material and a preparation method thereof. The submicron active mixed material is composed of a calcium admixture, a silicon admixture, an aluminum admixture, a sulfur admixture and an alkali activator, wherein the calcium admixture and the silicon admixture areboth obtained from stone powder generated in the preparation process of the machine-made sand. The problems of fluidity / slump loss and poor workability of the stone powder generated in the machine-made sand utilization process can be solved, the stone powder can be reused, and zero emission of solid waste in the machine-made sand production process is achieved. The technology is low in price, turns waste into resources, and is environment-friendly.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a submicron active mixed material used for cement-based materials and a preparation method thereof. Background technique [0002] Due to the unbalanced distribution of natural sand resources in my country and the continuous tightening of government mining restrictions, machine-made sand concrete has become an important trend in the development of modern concrete. The high content of stone powder in machine-made sand has become a bottleneck restricting the development of machine-made sand concrete. In addition, production restrictions or shutdowns of highly polluting industries such as steel, thermal power, etc. have directly led to a reduction in the output of high-quality mineral admixtures based on fly ash and mineral powder. my country's fly ash and other high-quality mineral admixture resource utilization technology has reached the international leading level, its p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B22/06C04B12/04C04B22/10
CPCC04B40/0042C04B14/285C04B14/14C04B14/303C04B14/365C04B22/062C04B14/28C04B14/06C04B12/04C04B18/0445C04B22/10
Inventor 李婷李晓宁朱玉雪马强宋作宝闫超强陈家继瞿海洋
Owner CNBM ZHONGYAN TECH
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