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Construction method capable of preventing large-size concrete from generating temperature cracks after construction is stopped
The invention discloses a construction method capable of preventing large-size concrete from generating temperature cracks after construction is stopped. The method comprises the steps that cement and asphalt mortar is poured on a concrete-poured layer before the construction is stopped; the placement temperature of the concrete to be poured is lowered; the concrete is poured; maintaining is carried out by adopting different modes in winter and summer. The content of asphalt in the cement and asphalt mortar is 12-15 wt%, the lime sand specific value range is 1:1.5-1:2.5, and the water lime specific value range is 0.4-0.55. By the adoption of the construction method, operation is convenient, cost is low, and the application range is wide. The cement and asphalt mortar has a good waterproof property and a good water insulating property, and can prevent water from seeping into a concrete structure from junctions of the concrete poured before and after the construction is stopped. The asphalt has flexibility of a certain degree, and can improve the tensile strength of the concrete, and prevent cracking caused by stress concentration. Accordingly, the risk of generating the temperature cracks after the construction is resumed can be effectively reduced, and the safety and the reliability of the large-size concrete structure are improved.
Construction method capable of preventing large-size concrete from generating temperature cracks after construction is stopped
The invention discloses a construction method capable of preventing large-size concrete from generating temperature cracks after construction is stopped. The method comprises the steps that cement and asphalt mortar is poured on a concrete-poured layer before the construction is stopped; the placement temperature of the concrete to be poured is lowered; the concrete is poured; maintaining is carried out by adopting different modes in winter and summer. The content of asphalt in the cement and asphalt mortar is 12-15 wt%, the lime sand specific value range is 1:1.5-1:2.5, and the water lime specific value range is 0.4-0.55. By the adoption of the construction method, operation is convenient, cost is low, and the application range is wide. The cement and asphalt mortar has a good waterproof property and a good water insulating property, and can prevent water from seeping into a concrete structure from junctions of the concrete poured before and after the construction is stopped. The asphalt has flexibility of a certain degree, and can improve the tensile strength of the concrete, and prevent cracking caused by stress concentration. Accordingly, the risk of generating the temperature cracks after the construction is resumed can be effectively reduced, and the safety and the reliability of the large-size concrete structure are improved.
Construction method capable of preventing large-size concrete from generating temperature cracks after construction is stopped
ZHANG YAN (author) / MENG QI (author) / JIANG LINHUA (author)
2015-05-20
Patent
Electronic Resource
English
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