scholarly journals Effect of Calcium Leaching on Diffusivity of Blended Cement Paste and Mortar

2021 ◽  
Vol 19 (5) ◽  
pp. 426-432
Author(s):  
Kiyofumi Kurumisawa ◽  
Kazuko Haga ◽  
Masahito Shibata ◽  
Daisuke Hayashi
Keyword(s):  
Cement Paste ◽  
Blended Cement ◽  
Calcium Leaching ◽  
Blended Cement Paste

Effect of incorporating iron‐filing waste on the properties of silica fume blended cement paste

2020 ◽  
Author(s):  
Moruf O. Yusuf ◽  
Sami I. Shamsah ◽  
Khaled A. Al‐Sodani ◽  
Salihu Lukman
Keyword(s):  
Silica Fume ◽  
Cement Paste ◽  
Blended Cement ◽  
Iron Filing ◽  
Blended Cement Paste

New scientific evidence of the effect of high temperatures and long curing times on MK-blended cement paste mineralogy

2022 ◽  
Vol 152 ◽  
pp. 106657
Author(s):  
M. Frías ◽  
S. Martínez-Ramírez ◽  
R. Vigil de la Villa ◽  
R. García-Giménez ◽  
M.I. Sánchez de Rojas
Keyword(s):  
High Temperatures ◽  
Cement Paste ◽  
Scientific Evidence ◽  
Blended Cement ◽  
Blended Cement Paste

scholarly journals Monitoring of Early and Late Age Hydration Products of Volcanic Ash Blended Cement Paste

Proceedings ◽  
2019 ◽  
Vol 34 (1) ◽  
pp. 9
Author(s):  
Joseph ◽  
Al-Bahar ◽  
Chakkamalayath ◽  
Al-Arbeed ◽  
Rasheed
Keyword(s):  
Portland Cement ◽  
Cement Paste ◽  
Volcanic Ash ◽  
Cement Hydration ◽  
Blended Cement ◽  
Sustainable Construction ◽  
Hydration Products ◽  
N2 Adsorption ◽  
Complete Replacement ◽  
Blended Cement Paste

One of the major concerns of concrete industries is to develop materials that consume less natural virgin resources and energy to make sustainable construction practices. Efforts have been made and even implemented to use the waste/by product materials such as fly ash, slag, silica fume, and natural pozzolana as a partial or complete replacement for Portland cement in concrete mixtures. The deterioration of concrete structures in the existing hot and cold climates of Gulf Cooperation Council countries, along with chloride and sulphate attack, demands the use of pozzolanic materials for concrete construction. Volcanic ash incorporated cement based concretes are known for its better performance in terms of strength and durability in harsh marine environments. Understanding the cement hydration process and characterizing the hydration products in microstructural level is a complex and interdependent process that allows one to design complex mix proportions to produce sustainable concrete materials. In this paper, the early and late age hydration behavior along with micro- and pore structure of cement paste samples prepared with locally available ordinary Portland cement (OPC) and volcanic ash (VA) obtained from Saudi Arabia was monitored using X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric (TGA) and N2-Adsorption analysis. The hydration progress of cement paste samples with different combinations of OPC and VA (0%, 15%, 25%, and 35%) at a w/c ratio of 0.45 after 14, 28, and 90 days were discussed. The qualitative XRD and SEM of cement paste samples showed no new phases were formed during the course of hydration. The disappearance of portlandite with increase in VA content was due to both pozzolanic effect and dilution effect. This was further confirmed quantitatively by the TGA observations that the samples with VA contain less Ca(OH)2 compared to the control specimens. N2 adsorption experiments after 90 days of curing showed larger hysteresis as the VA content increases. The studies show that the incorporation of volcanic ash certainly contributes to the generation of C-S-H and hence the cement hydration progress, especially in the later ages through pozzolanic reactions. A 15–25 % volcanic ash blended cement paste samples showed compact and denser morphological features, which will be highly detrimental for the durability performances.

Time-Dependent Rheological Changes of Fly Ash Blended Cement Paste

2012 ◽  
Vol 40 (5) ◽  
pp. 20120042 ◽  
Author(s):  
Wei Chen ◽  
Zhonghe Shui ◽  
Jianfeng Fan
Keyword(s):  
Fly Ash ◽  
Cement Paste ◽  
Blended Cement ◽  
Time Dependent ◽  
Blended Cement Paste

A Nondestructive EIS Method to Evaluate the Compressive Strength of Slag-Blended Cement Paste under Steam Curing

2019 ◽  
Vol 48 (6) ◽  
pp. 20180259
Author(s):  
X. C. Yan ◽  
L. H. Jiang ◽  
M. Z. Guo ◽  
Y. J. Chen ◽  
S. B. Jiang ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Cement Paste ◽  
Blended Cement ◽  
Steam Curing ◽  
Blended Cement Paste
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