scholarly journals Characterization of early-age hydration process and autogenous shrinkage evolution of high performance cement pastes based on 1H NMR

2021 ◽  
pp. 103436
Author(s):  
Dongbing Jiang ◽  
Xiangguo Li ◽  
Yang Lv ◽  
Changjiao Li ◽  
Ting Zhang ◽  
...  
Keyword(s):  
1H Nmr ◽  
High Performance ◽  
Autogenous Shrinkage ◽  
Hydration Process ◽  
Early Age ◽  
Cement Pastes ◽  
Early Age Hydration

Early-Age Autogenous Shrinkage of High-Performance Concrete Columns by Embedded Fiber Bragg-Grating Sensor

2009 ◽  
Vol 419-420 ◽  
pp. 1-4 ◽  
Author(s):  
Ying Wei Yun ◽  
Ii Young Jang ◽  
Seong Kyum Kim ◽  
Seung Min Park
Keyword(s):  
Fiber Bragg Grating ◽  
High Performance ◽  
High Performance Concrete ◽  
Construction Material ◽  
Autogenous Shrinkage ◽  
Strain Sensor ◽  
Bragg Grating ◽  
Early Age ◽  
Long Time ◽  
Sensor Temperature

High-performance concrete (HPC) as a promising construction material has been widely used in infrastructures and high-rise buildings etc. However, its pretty high autogenous shrinkage (AS) especially in its early age becomes one of the key problems endangering long-time durability of HPC structures. This paper carried out the early age AS research of large scaled HPC column specimens by embedded Fiber Bragg-Grating (FBG) strain sensor. Temperature compensation for FBG strain sensor by thermocouple was also attempted in this paper, and the results were reasonable and acceptable comparing with the result compensated by FBG temperature sensor. Reinforcement influence, size effect and temperature effect on HPC AS were also analyzed respectively in this paper.

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
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