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High-performance initial-stage sprayed concrete for high-earth temperature tunnel and preparation method thereof
The invention discloses a high-performance initial-stage sprayed concrete for high-earth temperature tunnel. The sprayed concrete is characterized in that: raw materials and amounts of per cubic meter of concrete are as follows: cement 300-400kg, fine sand 400-500kg, a blast furnace heavy slag 700-800kg, coal ash 60-100kg, an alumina clinker 40-80kg, a basalt fiber 20-40kg, a polycarboxylic acid high performance water reducer 3-5kg, an aluminate accelerator 10-15kg, and water 180-250kg. A preparation method comprises the following steps: preparing materials; carrying out mixing and stirring; adding a coarse aggregate; adding an aluminate accelerator, and spraying and pouring the concrete. Compared with the prior art, the invention has the advantages that: the sprayed concrete for supporting the high-earth temperature tunnel can be tightly combined with surrounding rocks, so that the surrounding rocks are integrally stable, and a concrete layer can be continuously sprayed for a next step of construction. In the high-earth temperature tunnel environment, the concrete has the advantages of fast solidification speed, good heat resistance, good anti-permeability and anti-cracking performance, the intensity is not reduced, so the construction requirement is met.
High-performance initial-stage sprayed concrete for high-earth temperature tunnel and preparation method thereof
The invention discloses a high-performance initial-stage sprayed concrete for high-earth temperature tunnel. The sprayed concrete is characterized in that: raw materials and amounts of per cubic meter of concrete are as follows: cement 300-400kg, fine sand 400-500kg, a blast furnace heavy slag 700-800kg, coal ash 60-100kg, an alumina clinker 40-80kg, a basalt fiber 20-40kg, a polycarboxylic acid high performance water reducer 3-5kg, an aluminate accelerator 10-15kg, and water 180-250kg. A preparation method comprises the following steps: preparing materials; carrying out mixing and stirring; adding a coarse aggregate; adding an aluminate accelerator, and spraying and pouring the concrete. Compared with the prior art, the invention has the advantages that: the sprayed concrete for supporting the high-earth temperature tunnel can be tightly combined with surrounding rocks, so that the surrounding rocks are integrally stable, and a concrete layer can be continuously sprayed for a next step of construction. In the high-earth temperature tunnel environment, the concrete has the advantages of fast solidification speed, good heat resistance, good anti-permeability and anti-cracking performance, the intensity is not reduced, so the construction requirement is met.
High-performance initial-stage sprayed concrete for high-earth temperature tunnel and preparation method thereof
CHEN GUOQING (author) / LI TIANBIN (author) / LIU HUI (author) / SU ZENGYU (author)
2016-01-06
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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