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
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[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 ...
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