Heat resistance concrete and preparation method thereof

A technology of heat-resistant concrete and raw materials, which is applied in the field of building materials, can solve the problems that the heat resistance cannot meet the requirements, achieve the effects of improving compactness and volume stability, small thermal expansion coefficient, and improving heat resistance

Inactive Publication Date: 2012-07-04
PINGDINGSHAN HENGJI CONCRETE
5 Cites 13 Cited by

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Problems solved by technology

Chinese patent document CN102060489A discloses a high-strength heat-resistant concrete, which uses granulated blast furnace slag as aggregate, and the test shows that there are swelling points on the surface of the concrete test block after burning at ...
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Abstract

The invention relates to heat resistance concrete and a preparation method thereof. The heat resistance concrete is prepared from the following raw materials comprising portland cement, coal ash, basalt with the particle size of between 20 and 40 millimeters, gravels with the continuous level of between 5 and 25, medium-coarse sand, a corrosion inhibitor, a water reducing agent, water and the like. The preparation method comprises the following steps of: selecting the raw materials; mechanically stirring for 2 to 3 minutes; after the raw materials are stirred and mixed uniformly, hierarchically pouring, wherein each layer is 25 to 30 centimeters thick; and after pouring, maintaining for at least 7 days in a damp environment with temperature of between 15 and 25 DEG C. The concrete prepared by stirring the raw materials according to the proportions has high peaceability and favorable viscosity; the performance of the mixture meets the construction requirement; the prepared concrete has the heat resistance of between 700 and 1,200 DEG C, the strength level of between C25 and C30, the high temperature strength of between 3.5 and 20 Mpa and the slumps of between 160 and 180 centimeters, can be pumped for construction, and is suitable for engineering with relatively high temperature and zero acid-base erosion.

Technology Topic

Damp environmentCoal +10

Examples

  • Experimental program(1)

Example Embodiment

[0020] Example 1 A C30 high-temperature resistant pumping concrete [designed bulk density 2400kg/m3], the coordination ratio is as follows:
[0021] Tianrui bulk ordinary Portland cement (POS42.5) 335㎏, fly ash (Yaomeng Power Plant Class I, 8% fineness, loss on ignition 1.5%) 75, FDN-G 7.4㎏, basalt 840㎏, continuous Grade 5-25 crushed stone 210kg, medium coarse sand (fineness modulus u=2.8, mud content less than 3%) 745kg, rust inhibitor 8.2kg, water 180kg.
[0022] The method for preparing the heat-resistant concrete includes the following steps:
[0023] (1) Select the raw materials according to the above raw material ratio, mechanically stir for 2.5 minutes, stir and mix, and then cast in layers, each layer having a thickness of 25-30cm;
[0024] (2) After pouring the heat-resistant concrete, cure it for 28 days in a humid environment at 15~25℃.
[0025] After 28 days of curing, the compressive strength was 42.6Mpa, after a period of high temperature (700℃), the compressive strength was 41.3MPa, and no cracks appeared.
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Description & Claims & Application Information

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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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