RESEARCH ON EARLY STRENGTH AND FREEZE-PROOF RESISTANCE OF AIR-ENTRAINED CONCRETE UNDER 3 ℃ CURING

Zhang Kai; Wang Qicai; Wang Qingshi; Li Sheng; Li Jianxin

doi:10.13204/j.gyjz201502002

Volume 45 Issue 2

Apr. 2015

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Zhang Kai, Wang Qicai, Wang Qingshi, Li Sheng, Li Jianxin. RESEARCH ON EARLY STRENGTH AND FREEZE-PROOF RESISTANCE OF AIR-ENTRAINED CONCRETE UNDER 3 ℃ CURING[J]. INDUSTRIAL CONSTRUCTION, 2015, 45(2): 5-9. doi: 10.13204/j.gyjz201502002

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Zhang Kai, Wang Qicai, Wang Qingshi, Li Sheng, Li Jianxin. RESEARCH ON EARLY STRENGTH AND FREEZE-PROOF RESISTANCE OF AIR-ENTRAINED CONCRETE UNDER 3 ℃ CURING[J]. INDUSTRIAL CONSTRUCTION, 2015, 45(2): 5-9. doi: 10.13204/j.gyjz201502002

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RESEARCH ON EARLY STRENGTH AND FREEZE-PROOF RESISTANCE OF AIR-ENTRAINED CONCRETE UNDER 3 ℃ CURING

doi: 10.13204/j.gyjz201502002

Publish Date: 2015-02-20

Abstract

Abstract

The strength， the pore structure and freeze-proof durability of air-entrained concrete under 3 ℃ temperature curing and with different air contents were researched by taking air-entrained concrete under low temperature curing ( 3 0. 2) ℃ as the object，adopting strength test mercury intrusion method，pore analytical method and fast freeze-thaw method． The results showed that when concrete of 3 ℃ temperature curing，as the air content was increased，the distribution of pore diameter was uniform and the interior pore structure of concrete was improved significantly，however，the pore structure under the room curing at the same air content of concrete was lower than under 3 ℃ curing． In order to expound the influence of air content on the actual concrete strength in an even better fashion，the concrete compressive strength under 3 ℃ curing can further be estimated by pore structure， which was compared with the room curing actual compressive strength，showing the difference between the two．
- concrete,
- 3 ℃ curing,
- air content,
- pore structure,
- actual strength

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