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Fast-hard, early-strength and high-performance all-solid waste concrete and preparation method thereof

A waste concrete, high-performance technology, applied in the field of solid waste resource utilization, can solve the problems of low early strength, polluted environment, limited amount of stones and sand, etc., to improve early hydration rate, reduce concrete cost, and increase commodity value Effect

Pending Publication Date: 2019-10-22
QIANAN WEISHENG SOLID WASTE ENVIRONMENTAL PROTECTION IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The present invention solves the problems of slow early hydration rate, long initial setting and final setting time, and low early strength of converter steel slag concrete. The existing concrete aggregates cannot effectively reuse waste, and the amount of stones and sand obtained by blasting stones from mountains is limited. And pollute the environment, the potential hydraulic gelation of refining slag has not been rationally utilized, at the same time, refining slag hardly participates in the growth of concrete strength in the later stage, and there is no precedent for using refining slag to adjust the early strength of concrete. Strong high-performance all-solid waste concrete and its preparation method

Method used

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  • Fast-hard, early-strength and high-performance all-solid waste concrete and preparation method thereof
  • Fast-hard, early-strength and high-performance all-solid waste concrete and preparation method thereof
  • Fast-hard, early-strength and high-performance all-solid waste concrete and preparation method thereof

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preparation example Construction

[0032] The invention provides a rapid-hardening, early-strength, high-performance all-solid waste concrete and a preparation method thereof.

[0033] The concrete includes 7% to 35% of cementitious material, 65% to 90% of aggregate and 0 to 3% of water reducing agent in weight percentage; wherein, the cementitious material is composed of 25% to 60% of slag, 1% to 20% of refining slag, 20% to 55% of converter steel slag and 10% to 20% of industrial by-product gypsum, aggregates include 40% to 60% of waste rock, 40% to 60% of iron tailings.

[0034] The method for preparing the all-solid waste concrete containing refining slag specifically includes the following steps:

[0035] (1) Grinding slag, converter steel slag, refining slag and industrial by-product gypsum separately or after mixing, and mixing according to mass ratio to obtain cementitious material;

[0036](2) Mix the cementitious material prepared in step (1), the aggregate, and the water reducing agent according to...

Embodiment 1

[0039] An all-solid waste concrete containing refining slag, the cementitious material of which is prepared from the following raw materials in mass percentage: 35% slag, 40% converter steel slag, 10% refining slag, 15% desulfurized gypsum, mixed grinding of slag and converter steel slag Up to a specific surface area of ​​560m 2 / kg, refining slag and desulfurized gypsum are mixed and ground to a specific surface area of ​​400m 2 / kg. In concrete, cementitious material accounts for 20.8%, aggregate accounts for 72.7%, and water reducing agent accounts for 0.2%. Among them, the coarse aggregate is waste rock, the fine aggregate is iron tailings, and the water reducing agent is solid polycarboxylic acid type high-efficiency water reducing agent. Aqua. The stability test of cementitious materials is carried out in accordance with the provisions of GB / T 1346-2011 "Cement Standard Consistency Water Consumption, Setting Time, and Stability Test Methods". The consistent all-solid ...

Embodiment 2

[0045] A concrete whose cementitious material is prepared from the following raw materials in mass percentage: 50% slag, 30% converter steel slag, 5% refining slag, 15% phosphogypsum, mixed grinding of slag and converter steel slag to a specific surface area of ​​560m 2 / kg, refining slag and desulfurized gypsum are mixed and ground to a specific surface area of ​​400m 2 / kg. In concrete, cementitious material accounts for 18.75%, aggregate accounts for 75.4%, and water reducing agent accounts for 0.19%. Among them, the coarse aggregate is waste rock, the fine aggregate is iron tailings, and the water reducer is solid polycarboxylic acid type high-efficiency water reducer. The stability test of cementitious materials is carried out in accordance with the provisions of GB / T 1346-2011 "Cement Standard Consistency Water Consumption, Setting Time, and Stability Test Methods". The consistent all-solid waste gelling material was prepared according to the above-mentioned "gelling m...

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Abstract

The invention provides a fast-hard, early-strength and high-performance all-solid waste concrete and a preparation method thereof, and belongs to the technical field of solid waste resource utilization. The concrete comprises, 7-35 wt% of a cementing material, 65-90 wt% of aggregates and 0-3 wt% of a water reducer, wherein the cementing material comprises 25-60 wt% of mineral slag, 1-20 wt% of refining slag, 20-55 wt% of converter steel slag and 10-20 wt% of industrial byproduct gypsum, and the aggregates include 40-60 wt% of waste stones and 40-60 wt% of iron tailings. The preparation methodcomprises the following steps: uniformly mixing the ground mineral slag, refining slag, converter steel slag and industrial byproduct gypsum to obtain the cementing material, and then uniformly mixingthe cementing material with the aggregates, the water reducer and water to obtain the concrete. The preparation method solves the problems of low early hydration rate, too long initial setting and final setting time and low early strength of the all-solid waste concrete containing the converter steel slag, effectively reduces the cost of the concrete, and has remarkable economic and environmentaleffects.

Description

technical field [0001] The invention relates to the technical field of solid waste resource utilization, in particular to a rapid-hardening, early-strength, high-performance all-solid waste concrete and a preparation method thereof. Background technique [0002] As the largest man-made building material in the world today, cement concrete is the most suitable way to utilize industrial waste on a large scale. The traditional cement concrete manufacturing industry has caused huge consumption of natural resources and energy, and caused great damage to the ecological environment. Using slag, fly ash, steel slag and other solid wastes to produce cementitious materials instead of cement can not only improve the comprehensive utilization rate of solid wastes, save resources and energy, bring environmental and economic benefits, but also contribute to Improve concrete performance and improve product quality level. [0003] Compared with other mineral admixtures, the current situat...

Claims

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Application Information

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IPC IPC(8): C04B28/08
CPCC04B28/082C04B2111/00017C04B2201/50C04B22/145C04B18/141C04B18/142C04B18/12C04B14/02C04B2103/302C04B22/144C04B22/146
Inventor 李颖倪文蔡水生吴伟卢翔宇汪坤
Owner QIANAN WEISHENG SOLID WASTE ENVIRONMENTAL PROTECTION IND CO LTD