Influence of storage period and water content of dry-mixed materials on dynamic compressive strength for ready-mixed shrinkage-compensating concrete
In order to investigate the influence of storage period and water content on dynamic mechanical properties of ready-mixed shrinkage-compensating concrete, the dynamic compression tests in 3 kinds of water contents(0.5% ,1.0% ,and 1.5%) and 4 kinds of storage periods(3 d,7 d,10 d,and 15 d) have been carried out by φ74 mm variable cross-section splitting Hopkinson pressure bar apparatus.The influence of water content and storage period on dynamic compressive strength and failure mode for ready-mixed shrinkage-compensating concrete have been analyzed.The result shows that at the same water content, the dynamic compressive strength decreases with the increase of storage period.When the water content is 0.5 %, the strength loss rate are 4.3 %, 22.2 %, 33.9 % and 47.5 % for the storage period of 3 d, 7 d, 10 d and 15 d.When the water content is 1.0 %, the strength loss rate are 11.1% 31.9 %, 41.6 % and 57.1% for the storage period of 3 d, 7 d, 10 d and 15 d.When the storage period is the same, the dynamic compressive strength decreases with the increase of water content.When the storage period is 7 d,the strength loss rate are 22.2% ,31.9% and 42.6% for the water content of 0.5% ,1.0% and 1.5%.When the storage period is 10 d, the strength loss rate are 33.9 %, 41.6 % and 51.5 % for the water content of 0.5 %, 1.0 % and 1.5 %,respectively.The failure degree tends to be more serious with the increase of storage period at the same water content.
shrinkage-compensating concrete dry-mixed materials dynamic compressive strength storage period water content
MA Qin-yong ZHANG Yang-yang MA Dong-dong
Engineering Research Center of Underground Mine Construction,Ministry of Education ,Anhui University School of Civil Engineering and Architecture ,Anhui University of Science and Technology, Huainan 23
国内会议
安徽淮北
英文
16-23
2017-10-14（万方平台首次上网日期，不代表论文的发表时间）