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Steel fiber reinforced ultra-high-performance concrete synergistically prepared by multiple solid waste and preparation method of steel fiber reinforced ultra-high performance concrete

An ultra-high-performance, steel fiber technology, applied in solid waste management, climate sustainability, sustainable waste treatment, etc., can solve the problems of difficulty in improving the strength of ultra-high-performance concrete, low overall utilization of steel slag, and large cement consumption , to achieve the effect of improving the comprehensive utilization rate, improving the intensity index, and improving the green degree

Active Publication Date: 2019-11-08
QIANAN WEISHENG SOLID WASTE ENVIRONMENTAL PROTECTION IND CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention aims to solve the problem that the existing ultra-high-performance concrete has a large amount of cement, a low overall utilization rate of steel slag, a large amount of natural aggregates, environmental pollution and cost increase, and the difficulty in improving the strength of ultra-high-performance concrete with low cement content. To solve such problems, provide a kind of multi-solid waste synergistic preparation of steel fiber reinforced ultra-high performance concrete and its preparation method

Method used

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  • Steel fiber reinforced ultra-high-performance concrete synergistically prepared by multiple solid waste and preparation method of steel fiber reinforced ultra-high performance concrete
  • Steel fiber reinforced ultra-high-performance concrete synergistically prepared by multiple solid waste and preparation method of steel fiber reinforced ultra-high performance concrete
  • Steel fiber reinforced ultra-high-performance concrete synergistically prepared by multiple solid waste and preparation method of steel fiber reinforced ultra-high performance concrete

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preparation example Construction

[0031] The invention provides a kind of steel fiber reinforced ultra-high performance concrete prepared by synergy of multiple solid wastes and a preparation method thereof. The concrete includes 35% to 50% of cementitious material, 35% to 50% of aggregate, and 0% by mass percentage. ~3% water reducing agent, 5%~8% steel fiber and 7%~9% water; among them, the cementitious material is composed of 40%~70% slag, 15%~35% hot-simmered converter steel slag , 5% to 20% of refining slag and 10% to 20% of industrial by-product gypsum, and the aggregate is one or both of quartz sand and drum-process converter steel slag.

[0032] When preparing the concrete, the slag, thermal converter slag, refining slag and industrial by-product gypsum are firstly ground separately, and then mixed to obtain a cementitious material; then the prepared cementitious material, aggregate, and water reducer , steel fiber and water are evenly mixed according to the mass ratio, and then poured into a shape and...

Embodiment 1

[0035] A kind of multi-solid waste synergistically prepared steel fiber reinforced ultra-high performance concrete, the cementitious material is prepared from the following raw materials: by weight percentage, slag 56.25%, thermal braising method converter slag 18.75%, refining slag 5%, desulfurization gypsum 20%; slag and thermally stewed converter slag are mixed and ground to a specific surface area of ​​550m 2 / kg, the refining slag is ground to a specific surface area of ​​564m 2 / kg, desulfurized gypsum is ground to a specific surface area of ​​400m 2 / kg. In concrete, in terms of weight percentage, cementitious material accounts for 38.1%, aggregate accounts for 47.7%, water reducer accounts for 0.4%, steel fiber accounts for 6.4%, and mixing water accounts for 7.6%. The aggregate is drum method converter steel slag, The water reducer is a solid polycarboxylate high-efficiency water reducer, and the steel fiber is a straight steel fiber with an aspect ratio of 60.

[...

Embodiment 2

[0041]A kind of multi-solid waste synergistically prepared steel fiber reinforced ultra-high performance concrete, the cementitious material is prepared from the following raw materials: by weight percentage, slag 56.25%, thermal braising method converter slag 18.75%, refining slag 5%, desulfurization gypsum 20%; slag and thermally stewed converter slag are mixed and ground to a specific surface area of ​​550m 2 / kg, the refining slag is ground to a specific surface area of ​​564m 2 / kg, desulfurized gypsum is ground to a specific surface area of ​​400m 2 / kg. In concrete, in terms of weight percentage, cementitious material accounts for 38.1%, aggregate accounts for 47.7%, water reducing agent accounts for 0.2%, steel fiber accounts for 6.4%, mixing water accounts for 7.6%, of which aggregate is quartz sand, water reducing agent The agent is a solid polycarboxylate high-efficiency water reducer, and the steel fiber is a straight steel fiber with an aspect ratio of 60.

[0...

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Abstract

The invention provides a steel fiber reinforced ultra-high-performance concrete synergistically prepared by multiple solid waste and a preparation method of the steel fiber reinforced ultra-high performance concrete, and belongs to the technical field of solid waste resource utilization. The steel fiber reinforced ultra-high-performance concrete is prepared from the components in percentage by weight: 35%-50% of a binding material, 35%-50% of an aggregate, 0%-3% of a water reducing agent, 5%-8% of a steel fiber and 7%-9% of water, during preparation, firstly slag, heat stewing converter slag,refining slag and industrial by-product gypsum are separately ground or ground in a mixed mode, and the binding material is prepared through even mixing; and then after the binding material, the skeletal material, the water reducing agent, the steel fiber and the water are stirred evenly in percentage by mass, casting molding is conducted and maintenance is conducted, and the steel fiber reinforced ultra-high-performance concrete synergistically prepared by the multi-solid waste is obtained. According to the steel fiber reinforced ultra-high-performance concrete and the preparation method, theultra-high-performance concrete with compressive strength of 100 MPa to 160 MPa and flexural strength of 35 MPa to 45 MPa in 28 days under the standard curing condition is prepared, the utilization rate of the solid waste in the ultra-high-performance concrete is increased significantly, the cost is lowered, and obvious environmental and economic benefits are achieved.

Description

technical field [0001] The invention relates to the technical field of solid waste resource utilization, in particular to a multi-solid waste collaborative preparation of steel fiber reinforced ultra-high performance concrete and a preparation method thereof. Background technique [0002] Compared with ordinary concrete, Ultra-High Performance Concrete (UHPC) can reduce the amount of cementitious materials by increasing the amount of cementitious materials, using highly active cementitious materials, reducing the water-binder ratio, and removing coarse aggregates. The internal defect rate, and the toughness and strength of concrete are improved by adding steel fibers, so that the overall performance of ultra-high performance concrete is significantly improved compared with ordinary concrete, and the application range is wider. [0003] At present, ultra-high-performance concrete also has some defects: such as high cement consumption, excessive heat of hydration, large shrink...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B18/14C04B14/48
CPCC04B28/144C04B28/142C04B28/143C04B2201/50C04B2201/52C04B18/141C04B18/142C04B14/48C04B2103/302C04B14/06Y02W30/91
Inventor 李颖倪文蔡水生吴伟牟欣丽
Owner QIANAN WEISHENG SOLID WASTE ENVIRONMENTAL PROTECTION IND CO LTD
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