High-strength concrete mixed with low-temperature rice husk ash

A technology of high-strength concrete and rice husk ash, which is applied in the field of high-strength concrete, can solve the problems of restricting the wide application of high-strength concrete, extremely high raw material requirements, and complicated processes, and achieve good volume stability and durability, fast strength development, and preparation technology simple effect

Inactive Publication Date: 2012-08-22
TONGJI UNIV
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Problems solved by technology

At present, there are some methods to prepare high-strength concrete. However, due to the extremely high requirements for the raw materials used in the preparation

Method used

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  • High-strength concrete mixed with low-temperature rice husk ash

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Effect test

Embodiment 1

[0040] Embodiment 1, a kind of high-strength concrete mixed with low-temperature rice husk ash, according to 42.5 grade ordinary Portland cement 100, low-temperature rice husk ash 10, S105 slag powder 10, fly ash 5, crushed stone 250, river sand 200, Water 35, the weight ratio of polycarboxylate superplasticizer 0.05 is prepared. The performance test results are shown in Table 1.

Embodiment 2

[0041] Embodiment 2, a kind of high-strength concrete mixed with low-temperature rice husk ash, according to 42.5 grade ordinary Portland cement 100, low-temperature rice husk ash 30, S95 slag powder 40, fly ash 25, crushed stone 400, river sand 350, Water 65, the weight ratio of polycarboxylate superplasticizer 3.00 is prepared. The performance test results are shown in Table 1.

Embodiment 3

[0042]Embodiment 3, a kind of high-strength concrete mixed with low-temperature rice husk ash, according to 42.5 grade ordinary Portland cement 100, low-temperature rice husk ash 15, S95 slag powder 20, fly ash 10, crushed stone 300, river sand 250, Water 40, the weight ratio of polycarboxylate superplasticizer 1.00 is prepared. The performance test results are shown in Table 1.

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Abstract

The invention belongs to the technical field of building materials, and particularly relates to high-strength concrete mixed with low-temperature rice husk ash, which comprises ordinary Portland cement, low-temperature rice husk ash, slag powder, coal powder ash, broken stones, river sand, water and water reducer. The low-temperature rice husk ash is prepared by burning rice husks at the lower temperature (600 DEG C) and grinding the burned rice husks. The specific surface area of nitrogen adsorption measurement of the high-strength concrete is 55-70m2/g, and the high-strength concrete has ultrahigh pozzolanic activity. By means of the high-strength concrete, the problem of rice husk processing can be solved, and the production cost of the high-strength concrete can be reduced. The high-strength concrete has the advantages of high workability, high strength, rapidity in strength development, mechanical property, durability and the like by being prepared from the ordinary Portland cement serving as cementing materials, the low-temperature rice husk ash, the slag powder and the coal powder ash serving as admixture, and the broken stones and the river sand serving as aggregate and the high-efficiency water reducer. Reusability of the rice husks is effectively realized by the aid of the high-strength concrete so that energy saving, emission reduction and environmental protection are achieved. Besides, production cost of the high-strength concrete can be reduced, and economic returns are improved.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to high-strength concrete mixed with low-temperature rice husk ash. Background technique [0002] my country is the largest rice producer in the world, producing more than 40 million tons of rice husks every year. The treatment of rice husks in my country, except for a very small part used for fuel, animal feed, filler for wine fermentation and field fertilizer, most of them are treated as agricultural waste or burned in the wild, causing great harm to road traffic safety and environmental quality . At the same time, with the development of my country's modernization construction, the demand for high-strength concrete is increasing. At present, there are some methods to prepare high-strength concrete. However, the raw materials used in the preparation are extremely demanding and the process is complicated. As an engineering material, its cost is too high, wh...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B18/30
CPCY02W30/91
Inventor 孙振平陈明庞敏刘警杨辉
Owner TONGJI UNIV
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