Effect of air-entraining agents on properties of solution and concrete
ZHANG Xiaodong
GAO Nanxiao
QIAO Min
CHEN Jian
RAN Qianping
Abstract：The solution properties,fresh concrete properties and hardened concrete properties of homemade compound air-en-training agent PYQ and common air-entraining agents K12,AOS,AES are compared. The results show that the bubble ability is K12>PYQ>AES>AOS,and the bubble stability is PYQ>AOS>AES>K12. Keep the same of initial air content, the bubble spacing co-efficient from mall to large is PYQ<AOS<AES<K12,and the number of 20～200μm effective bubbles from more to less is PYQ>AOS>AES>K12. An associated law is existent among air content, bubble spacing coefficient, pore distribution and bubble stability. The higher the air content of fresh concrete is given,the higher the air content of hardened concrete is obtained, the smaller the air-void spacing factor and the more air voids at the size of 20～200μm are also obtained,which indicates higher foam stability of the sample. The bubble spacing coefficient can accurately reflect the bubble stability of air-entraining agent. PYQ is a high per-formance air entraining agent with excellent entraining performance and foam stability,which can effectively improve the freezing resistance and slightly effect the strength of concrete.
Keywords：air-entraining agentsolution propertiescompressive strengthfreezing resistancebubble parameters
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 36-40 )