Effect of steam curing on surface permeability of concrete: Multiple transmission media

2020 ◽  
Vol 32 ◽  
pp. 101475 ◽  
Author(s):  
Jinyan Shi ◽  
Baoju Liu ◽  
Xiang Wu ◽  
Jinxia Tan ◽  
Jingdan Dai ◽  
...  
Keyword(s):  
Steam Curing ◽  
Surface Permeability ◽  
Multiple Transmission

Effect of steam curing regimes on temperature and humidity gradient, permeability and microstructure of concrete

2021 ◽  
Vol 281 ◽  
pp. 122562
Author(s):  
Jinyan Shi ◽  
Baoju Liu ◽  
Feng Zhou ◽  
Shuai Shen ◽  
Aofei Guo ◽  
...  
Keyword(s):  
Steam Curing ◽  
Humidity Gradient ◽  
Temperature And Humidity ◽  
Curing Regimes

Effect of chemical admixtures on the sulfate requirement of cement

1980 ◽  
Vol 7 (2) ◽  
pp. 256-263 ◽  
Author(s):  
M. A. Ward ◽  
S. M. Khalil ◽  
B. W. Langan
Keyword(s):  
Portland Cement ◽  
Initial Temperature ◽  
Precast Concrete ◽  
Steam Curing ◽  
Sulfate Content ◽  
Chemical Admixtures ◽  
Cost Of Energy ◽  
Hot Weather ◽  
The Cost ◽  
Ready Mixed Concrete

As the cost of energy and hence the cost of producing Portland cement increase, the question arises as to whether we are obtaining optimum performance from the admixtures we use. As an example, data are presented indicating that a significant improvement in strength and shrinkage can be achieved by optimizing the sulfate content of the cement for given cement–admixture combinations. It is shown that the optimum SO3 is clearly a function of the initial temperature of the concrete, particularly during the first 24 h after casting, a characteristic of considerable importance in hot weather concreting and steam curing of concrete products. It is recommended that more attention be directed towards optimizing the effectiveness of chemical admixtures in both the ready-mixed concrete and precast concrete industries.

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