【摘 要】
:
The relation between methylene blue (MB) value of MS and its limestone dust content and clay content was investigated. The effects of MB value ranging from 0.35 to 2.5 on the workability of fresh concrete and crack propagation characteristics at the age o
【机 构】
:
Key Laboratory of Road Structure and Material Ministry of Communications Beijing, Research Institute
【出 处】
:
武汉理工大学学报(材料科学版)(英文版)
论文部分内容阅读
The relation between methylene blue (MB) value of MS and its limestone dust content and clay content was investigated. The effects of MB value ranging from 0.35 to 2.5 on the workability of fresh concrete and crack propagation characteristics at the age of 24 hours, and effects on the mechanical properties, dry shrinkage of the harden concrete were tested. The experimental results show that the MB value is not related with the limestone dust content of MS, but in direct proportion to clay content. With the increase of MB value, the concrete workability decreases, and the flexural strength and 7 d compressive strength reduce markedly, whearas the 28 d compressive strength is not affected. When the MB-value is less than or equal to 1.35, the change of the MB-valuehas a little influence on early plastic cracking and dry shrinkage property of concrete, but when the MB-value is more than 1.35, the tendency of plastic cracking and dry shrinkage is remarkable.
其他文献
An ultrasonication assisted sol-gel processing route for MWNTs/Alumina was proposed.Using aluminum ethoxide as an alumina precursor and ethanol/water as a solvent,the dura-tion of the transformation from sol to gel under ultrasonication can be controlled
A new type of high temperature energy storage material was obtained through the melt infiltration method,using compounding SiC ceramic foam as matrix and Na_2SO_4 as phase change material.The resulting composite material was measured by XRD,SEM,TG-DSC met
The effects of glass powder on the strength development, chloride permeability and potential alkali-aggregate reaction expansion of lightweight aggregate concrete were investigated.Ground blast furnace slag, coal fly ash and silica fume were used as refer
Three beam samplesof bridge deck pavementwere prepared, with gradationtypes of AC-13, and AC-16 and combined AC-13+AC-16. Four-point bending test was adopted to investigate the fatigue performance of these beam samples. The experimental results indicate t