Characterization of the absolute volume change of cement pastes in early-age hydration process based on helium pycnometry

2017 ◽  
Vol 142 ◽  
pp. 490-498 ◽  
Author(s):  
Xu Yang ◽  
Zhenping Sun ◽  
Liangliang Shui ◽  
Yanliang Ji
Keyword(s):  
Volume Change ◽  
Hydration Process ◽  
Early Age ◽  
Cement Pastes ◽  
Absolute Volume ◽  
The Absolute ◽  
Early Age Hydration ◽  
Helium Pycnometry

scholarly journals CONTINUOUS MICROSTRUCTURAL CORRELATION OF SLAG/SUPERPLASTICIZER CEMENT PASTES BY HEAT AND IMPEDANCE METHODS VIA FRACTAL ANALYSIS

Fractals ◽  
2017 ◽  
Vol 25 (04) ◽  
pp. 1740003 ◽  
Author(s):  
S. W. TANG ◽  
R. J. CAI ◽  
Z. HE ◽  
X. H. CAI ◽  
H. Y. SHAO ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Fractal Analysis ◽  
Setting Time ◽  
Blended Cement ◽  
Impedance Measurement ◽  
Heat Evolution ◽  
Early Age ◽  
Contact Impedance ◽  
Cement Pastes ◽  
Early Age Hydration

This paper presents a preliminary work to evaluate the influence of slag and superplasticizer on the early-age hydration of cement pastes by an innovative non-contact impedance measurement, heat evolution method, compressive strength and setting time tests. Besides, the cumulative pore volume obtained from modulus and phase of impedance in different hydration sections is taken to continuously correlate the cumulative heat releasing of cement pastes via the fractal analysis. Retarded phenomena and mechanism of hydration in cement pastes incorporated with slag and superplasticizer are studied, respectively. It is found that the compressive strength and setting time have a good linear relation with the slag amount in blended cement pastes.

Study on the effect of chloride ion on the early age hydration process of concrete by a non-contact monitoring method

2018 ◽  
Vol 172 ◽  
pp. 499-508 ◽  
Author(s):  
Youyuan Lu ◽  
Guiyun Shi ◽  
Yuqing Liu ◽  
Zhu Ding ◽  
Jinlong Pan ◽  
...  
Keyword(s):  
Chloride Ion ◽  
Hydration Process ◽  
Early Age ◽  
Monitoring Method ◽  
Early Age Hydration

scholarly journals Parameters controlling early age hydration of cement pastes containing accelerators for sprayed concrete

2016 ◽  
Vol 89 ◽  
pp. 230-248 ◽  
Author(s):  
Renan P. Salvador ◽  
Sergio H.P. Cavalaro ◽  
Maria A. Cincotto ◽  
Antonio D. de Figueiredo
Keyword(s):  
Early Age ◽  
Cement Pastes ◽  
Sprayed Concrete ◽  
Early Age Hydration

scholarly journals Accelerated Early Age Hydration of Cement Pastes Blended with Sulphoaluminate Expansive Agent

2021 ◽  
Vol 19 (6) ◽  
pp. 655-667
Author(s):  
Luping Zeng ◽  
Shuang Zhao ◽  
Wei Wang ◽  
Min Qiao ◽  
Jinxiang Hong ◽  
...  
Keyword(s):  
Early Age ◽  
Cement Pastes ◽  
Expansive Agent ◽  
Early Age Hydration

scholarly journals Effect of MXene (Nano-Ti3C2) on Early-Age Hydration of Cement Paste

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Haibin Yin ◽  
Jianping Zhu ◽  
Xuemao Guan ◽  
Zhengpeng Yang ◽  
Yu Zhu ◽  
...  
Keyword(s):  
Cement Paste ◽  
Cement Hydration ◽  
Hydration Process ◽  
Early Age ◽  
Main Role ◽  
Hydration Products ◽  
Hydration Properties ◽  
Network Connection ◽  
The Impact ◽  
Early Age Hydration

As a new two-dimensional material, MXene (nano-Ti3C2) has been widely applied in many fields, especially for reinforced composite materials. In this paper, mechanical testing, X-ray diffraction (XRD), hydration heat, scanning electron microscope (SEM), and EDS analysis were used to analyze the impact of MXene on cement hydration properties. The obtained results revealed that (a) MXene could greatly improve the early compressive strength of cement paste with 0.04 wt% concentration, (b) the phase type of early-age hydration products has not been changed after the addition of MXene, (c) hydration exothermic rate within 72 h has small difference at different amount of MXene, and (d) morphologies of hydration products were varied with the dosage of MXene, a lot of tufted ettringites appeared in 3 d hydration products when the content of MXene was 0.04 wt%, which will have a positive effect on improving the early mechanical properties of cement paste. MXene has inhibited the Portland cement hydration process; the main role of MXene in the cement hydration process is to promote the messy ettringite becoming regular distribution at a node and form network connection structure in the crystals growth process, making the mechanics performance of cement paste significantly improved.

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