Structure reinforcing material taking steel slag as aggregate

A technology for reinforcing materials and steel slag, applied in solid waste management, sustainable waste treatment, climate sustainability, etc., can solve problems such as changing the riverbed morphology, accelerating resource consumption, destroying natural ecology, etc., to achieve high environmental benefits and social Benefit, improve production and construction efficiency, good durability

Inactive Publication Date: 2012-11-07
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large amount of steel slag accumulation not only occupies land, but also a great waste of resources
The utilization rate of steel slag in our country is less than 15%. Although some achievements have been made in the development and application of steel slag resource technology in recent years, the utilization rate of steel slag is still far behind that of developed countries. It is mainly used for road construction and Backfilling engineering material with less use as aggregate in mortar and concrete
The materials of natural river sand mainly come from excavating the river bed, which changes the shape of the river bed, affects shipping and even causes serious consequences such as river diversion, which not only seriously damages the natural ecology, but also accelerates the consumption of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1, a structural reinforcement material with steel slag as aggregate, 100 grades of 42.5 ordinary Portland cement, 50 steel slag, 10 S75 slag powder, 5 grade II high-calcium fly ash, 15 zeolite powder, and 1 latex powder , Cellulose ether 0, defoamer 0, polycarboxylate water reducer 0.05 weight ratio prepared. After adding water to 30% of the total weight of the reinforced material and stirring evenly, the fluidity is 240mm, the loss rate is 12% in 1h, the 28-day compressive strength is 57.0MPa, the 28-day flexural strength is 8.0MPa, and the 28-day tensile bonding The strength is 0.8MPa, and the 28-day shrinkage rate is 0.067%.

Embodiment 2

[0040]Example 2, a structural reinforcement material using steel slag as aggregate, according to 52.5 grade ordinary portland cement 100, steel slag 500, S95 slag powder 50, grade II high calcium fly ash 40, zeolite powder 3, latex powder 5 , cellulose ether 1.0, defoamer 0.10, polycarboxylate water reducer 0.50 weight ratio prepared. After adding water to 8% of the total weight of the reinforced material and stirring evenly, the fluidity is 155mm, the loss rate is 13% in 1h, the compressive strength is 68.0MPa in 28 days, the flexural strength is 12.0MPa in 28 days, and the tensile bond is 28 days The strength is 1.8MPa, and the shrinkage rate is 0.061% in 28 days.

Embodiment 3

[0041] Example 3, a structural reinforcement material using steel slag as aggregate, according to 42.5 grade ordinary portland cement 100, steel slag 400, S95 slag powder 35, grade III high calcium fly ash 20, zeolite powder 10, latex powder 3 , cellulose ether 0.5, defoamer 0.06, polycarboxylate water reducer 0.20 weight ratio prepared. After adding water to 30% of the total weight of the reinforced material and stirring evenly, its fluidity is 180mm, the loss rate is 9% in 1h, the compressive strength is 62.0MPa in 28 days, the flexural strength is 11.0MPa in 28 days, and the tensile bond is 28 days The strength is 1.3MPa, and the shrinkage rate is 0.047% in 28 days.

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Abstract

The invention belongs to the technical field of building materials, and in particular relates to a structure reinforcing material taking steel slag as aggregate. The material consists of cement, the steel slag, mineral slag powder, fly ash, zeolite powder, latex powder, cellulose ether, an antifoaming agent and a polycarboxylic acid water reducing agent. The steel slag is subjected to hot closed treatment; the problem that the common steel slag easily cause low stability of the material can be solved, and the solid waste in the steelmaking industry, namely the steel slag is recycled and efficiently utilized; the cost of the conventional cement-based reinforcing material can be reduced, and the material has higher construction property, mechanical property and durability; and the material has high compression strength, breaking strength and durability and low shrinkage, and is suitable for the reinforcing engineering of various buildings and bridges.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a structural reinforcement material using steel slag as aggregate. Background technique [0002] The construction industry is an important material production sector of the national economy, and it is closely related to the development of the entire country's economy and the improvement of people's lives. Concrete is the most important building material. The designed service life of ordinary buildings is 30-50 years. A large number of residential buildings, factories and other buildings delivered for use from the early days of liberation to the 1980s have reached the stage of inspection, reinforcement and repair. According to statistics, the houses that need to be reinforced and repaired account for 20%-30% of the existing houses in my country. The reinforcement and repair of buildings not only require scientific and reasonable design, but also need reinfo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/08C04B18/14
CPCC04B20/04C04B28/04Y02W30/91C04B18/142C04B14/047C04B18/08C04B18/141C04B24/26C04B24/2641C04B24/383C04B2103/50C04B2103/302
Inventor 孙振平杨洁刘警杨辉
Owner TONGJI UNIV
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