地面混凝土垫层施工工艺（Construction technology of ground concrete cushion）.docVIP

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地面混凝土垫层施工工艺（Construction technology of ground concrete cushion）.doc

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地面混凝土垫层施工工艺（Construction technology of ground concrete cushion）

地面混凝土垫层施工工艺（Construction technology of ground concrete cushion） Construction technology of ground concrete cushion The process standard is applicable to the construction of concrete cushion on the floor of industrial and civil buildings. 2.1 materials and main equipment: 2.1.1 cement: 325 Portland cement, ordinary portland cement and slag Portland cement should be used. 2.1.2 sand: medium sand or coarse sand, containing less than 5% of the mud. 2.1.3 stone: gravel or gravel, the particle size of 0.5 ~ 3.2mm, containing mud is not greater than 2%. 2.1.4 concrete mixer, scales, trolley or dump trucks, shovels, spades, sharp flat plate vibrator, string barrel or chute, scraping bars, wood trowel, rubber hose, iron chisel, wire brush. 2.2 operating conditions: 2.2.1 the main structure of the quality of the project has been completed acceptance procedures, the door frame installed, the wall has been played well, +50cm horizontal mark, high-speed wire. 2.2.2 the insulated pipe line through the floor has been installed, the tunnel has been poured into fine stone concrete, and it has been packed tightly. 2.2.3 the horizontal tube laid in the cushion has been completed and has gone through the hidden procedures. 2.2.4 in the first floor of the ground before pouring concrete cushion, through the interior of the heating ditch and trench, heating pipe has been completed, drainage pipes completed and completed acceptance procedures, indoor backfill has been sub item quality inspection assessment. 3.1 process: Basic level treatment: looking for elevation, horizontal control line, concrete mixing, laying concrete and vibrating Leveling maintenance 3.1.1: the primary treatment laitance on the concrete base, the loose bond such as concrete and mortar with a chisel out of it with a wire brush off the cement slurry skin, then brush. 3.1.2 looking for elevation bomb horizontal control line: according to the +50cm horizontal mark on the wall, the height of the cushion is measured down,