scholarly journals Rheology of pure and mineral admixture modified cement pastes and their degradation due to calcium leaching

2019 ◽  
Vol 490 ◽  
pp. 032031
Author(s):  
Hu Yang ◽  
Cairong Lu ◽  
Weibao Liu ◽  
Guoxing Mei ◽  
Heng Wang ◽  
...  
Keyword(s):  
Mineral Admixture ◽  
Cement Pastes ◽  
Calcium Leaching

Impact of calcium leaching on mechanical and physical behaviors of high belite cement pastes

2021 ◽  
Vol 286 ◽  
pp. 122983
Author(s):  
Chunmeng Jiang ◽  
Linhua Jiang ◽  
Xinjun Tang ◽  
Jingwei Gong ◽  
Hongqiang Chu
Keyword(s):  
Cement Pastes ◽  
Calcium Leaching ◽  
Belite Cement

Analytical Study on the Flexural Behavior of Reinforced Concrete Beam with Mineral Admixture under Calcium Leaching Degradation

2018 ◽  
Vol 940 ◽  
pp. 123-127
Author(s):  
Il Sun Kim ◽  
Yoon Suk Choi ◽  
Chan Kyu Lee ◽  
Eun Ik Yang
Keyword(s):  
Finite Element ◽  
Load Capacity ◽  
Pure Water ◽  
Reinforced Concrete Beam ◽  
Mineral Admixture ◽  
Flexural Behavior ◽  
Mineral Admixtures ◽  
Finite Element Program ◽  
Calcium Leaching ◽  
Element Program

Calcium leaching degradation could be happened in reinforcement concrete member due to the contact with pure water in underground condition. Thus, it is needed to evaluate the resistance of calcium leaching for concrete mixed with mineral admixtures. So, in this paper, to evaluate the flexural behavior in RC member with mineral admixture under calcium leaching degradation, we investigated the effect of calcium leaching using the non-linear finite-element program. From the results, the load capacity and flexible rigidity of a degraded RC member decrease when the degradation level increases with leaching period. And, regardless of the type of mineral admixtures, finite-element-method analysis effectively showed the characteristics of calcium leaching damaged RC beam.

scholarly journals Microstructure and hardness of cement pastes with mineral admixture

2017 ◽  
Vol 22 (2) ◽  
Author(s):  
Dayana Cristina Silva Garcia ◽  
Marcela Maira Nascimento de Souza Soares ◽  
Augusto Cesar da Silva Bezerra ◽  
Maria Teresa Paulino Aguilar ◽  
Roberto Braga Figueiredo
Keyword(s):  
Mineral Admixture ◽  
Cement Pastes

scholarly journals A Method for Internal Curing Water Calculation of Concrete with Super Absorbent Polymer

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Shouqi Zhang ◽  
Zhenbao Lu ◽  
Yongxin Li ◽  
Yuan Ang ◽  
Kechao Zhang
Keyword(s):  
Phase Distribution ◽  
Autogenous Shrinkage ◽  
Mineral Admixture ◽  
Internal Curing ◽  
Hardened Concrete ◽  
Hardened Cement ◽  
Cement Pastes ◽  
Super Absorbent Polymer ◽  
Degree Of Hydration ◽  
Absorbent Polymer

The internal curing method is effective in reducing the self-desiccation of concrete, and the amount of internal curing water (IC water) is greatly important to the shrinkage and strength of concrete. A method for calculating IC water of concrete with and without mineral admixture has been developed. The method is derived from Powers’ model for the phase distribution of a hydrating cement paste. To verify the method, a series of autogenous shrinkage and compressive strength of concrete with and without super absorbent polymer (SAP) were evaluated compared with the method proposed previously. To explain the macro performance of hardened concrete, the nonevaporable water content and calcium hydroxide content measurement were utilized to evaluate the degree of hydration of cement pastes. And, mercury intrusion method and image analysis method were used to explore the pore structure in hardened cement pastes and air void characteristics in hardened concrete, respectively. Furthermore, the evolution process was also studied for the relative humidity inside the concrete.

Study on the Hydration Micro-Structure and Properties of Complex Cementitious Systems

2010 ◽  
Vol 150-151 ◽  
pp. 783-787
Author(s):  
Qing Jun Ding ◽  
Xiu Lin Huang ◽  
Hua Sun
Keyword(s):  
Fly Ash ◽  
Pore Size Distribution ◽  
Mineral Admixture ◽  
Mineral Admixtures ◽  
Structure And Properties ◽  
Total Dosage ◽  
Micro Structure ◽  
Cement Pastes ◽  
Cementitious Systems ◽  
Better Than

In this study complex cementitious systems were prepared by cement, slag, fly ash and silica fume. Changing the dosages of mineral admixtures, then studying the strength and micro-structure of harden cement pastes by XRD,SEM,BET etc. Comparing the influence of variety and dosage of mineral admixture on cement pastes.Finally we found that mineral admixtures could improve the pore size distribution of cement pastes, and the total dosage 10% is better than 20%; and the "FA+SF" is better than others.

scholarly journals Effects of calcium leaching on diffusion properties of hardened and altered cement pastes

2017 ◽  
Vol 99 ◽  
pp. 175-183 ◽  
Author(s):  
Kiyofumi Kurumisawa ◽  
Kazuko Haga ◽  
Daisuke Hayashi ◽  
Hitoshi Owada
Keyword(s):  
Cement Pastes ◽  
Calcium Leaching ◽  
Diffusion Properties
Sign in / Sign up

Export Citation Format

Share Document