scholarly journals Study of the pore solution and the microstructure of mineral additions blended cement pastes

2017 ◽  
Vol 139 ◽  
pp. 584-589 ◽  
Author(s):  
R. Cherif ◽  
A.A. Hamami ◽  
A. Aït-Mokhtar ◽  
J-F Meusnier
Keyword(s):  
Pore Solution ◽  
Blended Cement ◽  
Cement Pastes ◽  
Mineral Additions

Shrinkage of Blended Cement Pastes with Mineral Additions

2013 ◽  
Vol 539 ◽  
pp. 55-59
Author(s):  
Yi Chen ◽  
Wu Yao ◽  
Dan Jin
Keyword(s):  
Fly Ash ◽  
Silica Fume ◽  
Cement Paste ◽  
Mercury Intrusion Porosimetry ◽  
Construction Materials ◽  
Blended Cement ◽  
Cement Pastes ◽  
Mercury Intrusion ◽  
Mineral Additions ◽  
By Products

Mineral additions such as fly ash and silica fume are industrial by products, and play an important role in properties improvement for construction materials. In this work, the shrinkage of cement paste blended with fly ash and silica fume by different substitute ratio was studied. Pore structures of specimens at different ages were determined by mercury intrusion porosimetry (MIP) and shrinkage deformation was measured by standard shrinkage tests. The effects of mineral addtions on shrinkage were discussed. The results show that the fly ash was significantly effective on shrinkage at early ages. Based on the research, several suitable advices were offered to optimize the performances of materials and reduce the shrinkage.

Chemical properties of pore solution of hardened cement pastes with mineral additions

2020 ◽  
pp. 1-11 ◽  
Author(s):  
Rachid Cherif ◽  
Ameur El Amine Hamami ◽  
Abdelkarim Aït-Mokhtar ◽  
Rafat Siddique
Keyword(s):  
Pore Solution ◽  
Chemical Properties ◽  
Hardened Cement ◽  
Cement Pastes ◽  
Mineral Additions ◽  
Hardened Cement Pastes

scholarly journals Rheological Behavior of Fresh Cement Pastes

Fluids ◽  
2018 ◽  
Vol 3 (4) ◽  
pp. 106 ◽  
Author(s):  
Francisco-José Rubio-Hernández
Keyword(s):  
Rheological Behavior ◽  
Flow Behavior ◽  
Viscoelastic Behavior ◽  
Alternative Methods ◽  
Chemical Additives ◽  
Research Activity ◽  
Cement Pastes ◽  
Blended Cements ◽  
Flow Models ◽  
Mineral Additions

Rheology of a concrete is mainly controlled by the rheological behavior of its cement paste. This is the main practical reason for the extensive research activity observed during 70 years in this research subfield. In this brief review, some areas of the research on the rheological behavior of fresh cement pastes (mixture method influence, microstructure analysis, mineral additions influence, chemical additives influence, blended cements behavior, viscoelastic behavior, flow models, and flow behavior analysis with alternative methods) are examined.

Assessment of Anhydrous Ethanol Extraction to Determine the Ionic Concentration of Hardened Cement Pastes

2010 ◽  
Vol 177 ◽  
pp. 506-509 ◽  
Author(s):  
Man Jian Wu ◽  
Wu Yao ◽  
Wei Wang ◽  
Yong Qi Wei
Keyword(s):  
Pore Solution ◽  
Ph Value ◽  
Ionic Concentration ◽  
Anhydrous Ethanol ◽  
Hardened Cement ◽  
Cement Pastes ◽  
Ethanol Extraction ◽  
Alkali Ions ◽  
Ph Values ◽  
Hardened Cement Pastes

A new method involving the extraction of various ions from hardened cement pastes by anhydrous ethanol is presented to determine the pH value and ionic concentration during the first 28 days. The volume content of pore solution extracted by ethanol in the leachate reached 12% or above and the pH values calculated by alkali ions are more than 12, even up to 12.73. The results were compared with those from parallel, conventional pore water expression experiments. All of these comparisons verified the feasibility of the proposed method. However, the application of this method to pore solution analysis needs further improvement.

Inertisation of Cd2+ions by using blended cement pastes

2013 ◽  
Vol 25 (2) ◽  
pp. 80-85 ◽  
Author(s):  
Eisa E. Hekal ◽  
Essam A. Kishar ◽  
Maha R. Mohamed ◽  
Badria A. Mohamed
Keyword(s):  
Blended Cement ◽  
Cement Pastes

Measurement of porosity in blended cement pastes

1988 ◽  
Vol 18 (1) ◽  
pp. 63-73 ◽  
Author(s):  
Robert L. Day ◽  
Bryan K. Marsh
Keyword(s):  
Blended Cement ◽  
Cement Pastes

Device for Pore Solution Extraction from Cement-Based Materials and its Application

2016 ◽  
Vol 680 ◽  
pp. 365-369
Author(s):  
Jian Liang Zhang ◽  
An Qun Lu ◽  
Hua Li ◽  
Rui Wang ◽  
Wen Bin Wang ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Pore Solution ◽  
Early Age ◽  
Cement Pastes ◽  
Cement Based Materials ◽  
Different Ages ◽  
Low Rate ◽  
Relevant Factors

In this paper, a device for pore solution extraction from cement-based materials was presented, The relevant Factors of Efficiency of Pore Solution Extraction and the effects of squeezing pressures on the chemical concentrations of pore solutions were studied. The results shows, the efficiency of pore solution extraction can be effected by pressure values, squeezing duration, pressure maintaining time; A low rate of pressures loading is suitable for early-age cement pastes, and long-term samples can take larger rate; 30 minutes loading time can be adopted for specimens with all the different ages; no significant differences were observed regarding the chemical composition (Na and K) of the pore solution extracted between 300 and 900MPa.

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