Civil Engineering Reference
In-Depth Information
discussed previously, we must not employ admixture but have to employ it in any
conditions. It is a wrong position to arrange it in necessary components. The author
insists correct position of admixture should be helping us improve a certain unfa-
vorable characteristic of concrete in special condition. Just like medicine, it can cure
some
of concrete. In the context of keeping lower water-to-binder ratio,
we employ water reducer that is more effective for purpose of obtaining a larger
slump and better workability; we employ pumping agent in the same condition for
purpose of pumping concrete to high
“
disease
”
floors. Employing of pumping agent is like
athlete eating stimulant. All medicines have their side effects, so its negative cannot
be ignored. Only in this way can we help utilization and development of admixture
get on a correct and scienti
c way.
References
1. Qian X, Zhan S, Fang M, Meng T, Qian K (2004) Negative effect of water reducer on concrete
shrinkage and crack, Journal of Railway science and engineering, 02
2. Mingjiji An, Weizu Qin, Jinquan Zhu (1992) Experimental study on autogenous shrinkage of
high strength concrete. J Shandong Inst Build Mater 12(S1):139
143
3. Xinyun W, Yibo Y (2004) Study on effect of chemical and mineral admixture on shrinkage and
cracking of cement mortar [M]. Crack controlling guide for concrete structure. Chemistry
Industry Press, Beijing
4. Miu C, Liu J, Tian Q et al (2004) In
uence of chemical admixture on concrete shrinkage
property [M]. Crack controlling guide for concrete structure. Chemistry Industry Press, Beijing
pp 39
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52
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