Construction process of steel fiber shotcrete
A technology of sprayed concrete and construction technology, which is applied in earthwork drilling, foundation structure engineering, wellbore lining, etc. It can solve the problems of difficult control of water and ash, short construction distance, high rebound rate, etc., so as to improve construction quality and facilitate construction quality Effect
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[0018] Example one,
[0019] The project selected by the present invention is a project in the Weiyuan section of Gansu, Lanzhou-Chongqing Railway. , to achieve better workability, durability, strength and economy.
[0020] The concrete technical steps adopted in the present invention are as follows:
[0021] 1. Requirements for construction materials of steel fiber sprayed concrete
[0022] (1) Cement and water-cement ratio: Portland cement is selected for cement, with a grade of 32.5, and the water-cement ratio is generally 0.40 to 0.60.
[0023] (2) Aggregate: medium-coarse river sand is selected for sand, the fineness modulus is 2.5 to 3.3, and the particle size is selected for the stone, but the maximum particle size should not exceed 10mm. The sand rate is generally 50% to 100%.
[0024] (3) Steel fiber: the elastic modulus of the steel fiber is 200GPa, the tensile strength is 380-1300MPa, and the ultimate elongation is 3%-30%. The length of the steel fiber is 20-35...
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