Early-age electrical resitivity and reactive capacity of mineral admixtures in mortars

2006 ◽  
Vol 21 (4) ◽  
pp. 158-162
Author(s):  
Liang Wenquan ◽  
He Zhen ◽  
Zhang Yongchuan ◽  
Chen Meizhu ◽  
Yang Huaquan
Keyword(s):  
Mineral Admixtures ◽  
Early Age ◽  
Reactive Capacity

Low temperature alkaline activation of weathered fly ash: Influence of mineral admixtures on early age performance

2015 ◽  
Vol 86 ◽  
pp. 169-177 ◽  
Author(s):  
Francesco Messina ◽  
Claudio Ferone ◽  
Francesco Colangelo ◽  
Raffaele Cioffi
Keyword(s):  
Fly Ash ◽  
Low Temperature ◽  
Mineral Admixtures ◽  
Early Age ◽  
Alkaline Activation

scholarly journals Early-Age Tensile Basic Creep Behavioral Characteristics of High-Strength Concrete Containing Admixtures

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Tongyuan Ni ◽  
Yang Yang ◽  
Chunping Gu ◽  
Jintao Liu ◽  
Jin Chen ◽  
...  
Keyword(s):  
High Strength Concrete ◽  
High Strength ◽  
Plain Concrete ◽  
Tensile Creep ◽  
Mineral Admixtures ◽  
Basic Creep ◽  
Early Age ◽  
Strength Concrete ◽  
Holding Period ◽  
Linear Characteristic

Tensile creep is an important parameter to evaluate cracking probability of high-strength concrete (HSC) structure, and the mineral admixtures have great effect on it. In this paper, the early-age tensile basic creep behaviors of HSC containing fly ash (FA) and blast furnace slag (BS) were investigated by experiments, and the influences of loading age and stress level (stress-strength ratio of initial loading) were evaluated. The results showed that FA promoted the early-age tensile basic creep while BS inhibited the early-age tensile creep. Moreover, the influence of loading age on early-age tensile basic creep of HSC was more significant, and the affected ages’ duration was longer than that of plain concrete. The early-age tensile basic creep of HSC containing admixtures also showed linear creep characteristic after a certain age as HSC without admixtures, and the linear characteristic was more obvious at a later loading age. The tensile basic creep velocity of HSC containing FA was the highest, while HSC containing BS exhibited the lowest velocity. The influence of admixtures on velocities of tensile basic creep was gradually attenuated with the age growth in holding period.

Shrinkage Cracking of High Performance Concrete Mixed with Steel Slag Admixture

2011 ◽  
Vol 462-463 ◽  
pp. 867-871 ◽  
Author(s):  
Yun Feng Li ◽  
Hua Xun Guo ◽  
Ling Ling Wang
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Steel Slag ◽  
Concrete Structures ◽  
Mineral Admixtures ◽  
Maintenance Cost ◽  
Shrinkage Stress ◽  
Early Age ◽  
Restrained Shrinkage ◽  
Shrinkage Cracking

Cracking due to the restrained shrinkage stress has been frequently observed at early age in concrete structures. Early-age deterioration of concrete due to cracking and higher maintenance cost for poor durability cause serious troubles to concrete structures. Steel slag includes a certain scale mineral such as C2S and C3S, and can be applied in cement and concrete as mineral admixtures. Two tests are outlined to quantify the behaviour of concrete under restrained shrinkage using plate and ring specimens. The results show that mineral admixtures can be used to reduce cracking in concrete. The risk of cracking can be estimated for steel slag concrete, so that it will improve the durability of concrete structures.

Influence of Compounded Mineral Admixtures on Shrinkage and Early-Age Cracking Behaviors of Concrete

2012 ◽  
Vol 450-451 ◽  
pp. 738-742
Author(s):  
Xue Fang Wang ◽  
Jian Lan Zheng
Keyword(s):  
Blast Furnace ◽  
Fly Ash ◽  
Synergistic Effect ◽  
Silica Fume ◽  
Blast Furnace Slag ◽  
Mineral Admixture ◽  
Mineral Admixtures ◽  
Early Age ◽  
Volume Stability ◽  
Furnace Slag

Influence of compounded mineral admixtures on shrinkage and early-age cracking behaviors of concrete was studied, based on the fellow factors: fly ash to blast furnace slag(denoted as BSF) ratio, fly ash-metakaolin ratio, BSF-silica fume ratio. Research shows that the Pozzolanic admixtures compounded with cementitious admixtures have complementary and synergistic effect for hydration progress of concrete, which can enhance the volume stability and cracking behaviors of concrete. However, the pozzolanic admixture compounded with other pozzolanic admixture, two pozzolanic admixtures will grab Ca(OH)2 resource. And then if the dosage of mineral admixture is higher, the compounding will result to decrease the volume stability and cracking behaviors of concrete.

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