Early Hydration Kinetics of Cementitious Materials Containing Different Steel Slag Powder Contents

Cui, Xiaowei; Wen, Ning; Ren, Chao

doi:10.18280/ijht.340406

Cited by 7 publications

(3 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a result, the strength of the test cubes continued to increase during the hydration (Figure 3B) . By 28 days of hydration, the structure became more compact as the unreacted fine particles in the raw material were interweaved and wrapped by the AFt crystals and the C-S-H gel in the cementitious system (Figure 3C) (Cui and Ren, 2016) This lead to increase the strength of the test cubes further and was consistent with the strength test results.…”

Section: Micromorphological Analysis Of Mortar Test Blockssupporting

confidence: 77%

Synergistic Excitation Mechanism of CaO-SiO2-Al2O3-SO3 Quaternary Active Cementitious System

Niu

Zhang

et al. 2021

Front. Mater.

View full text Add to dashboard Cite

In this study, the influence of steel slag (SS) content on the strength of the cementitious materials was investigated. The quaternary active cementitious material (CaO-SiO2-Al2O3-SO3) was prepared using various proportions of steel slag (SS), granulated blast furnace slag (BFS), and desulfurized gypsum (DG). The mechanism of synergistic excitation hydration of the cementitious materials was examined using various techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform infrared spectrometry (FTIR). The strength of the mortar test block was initially increased and decreased later with the increase of the SS content. Mortar test block with 20% steel slag, 65% granulated blast furnace slag, and 15% desulfurized gypsum with 0.35 water-binder ratio showed the highest compressive strength of 57.3 MPa on 28 days. The free calcium oxide (f-CaO) in the SS reacted with water and produced calcium hydroxide (Ca(OH)2) which created an alkaline environment. Under the alkaline environment, the alkali-activated reaction occurred with BFS. In the early stage of hydration reaction, calcium silicate hydrate (C-S-H) gel and fibrous hydration product ettringite (AFt) crystals were formed, which provided early strength to the cementitious materials. As the hydration reaction progressed, the interlocked growth of C-S-H gel and AFt crystals continued and promoted the increase of the strength of the cementitious system.

show abstract

Section: Micromorphological Analysis Of Mortar Test Blockssupporting

confidence: 77%

Synergistic Excitation Mechanism of CaO-SiO2-Al2O3-SO3 Quaternary Active Cementitious System

Niu

Zhang

et al. 2021

Front. Mater.

View full text Add to dashboard Cite

show abstract

“…Test Methods Targeted at measuring the distribution of longitudinal residual stress in the I-section members, the rosettes are arranged along the centerline of the cross-section of each specimen [13][14][15][16][17][18][19][20][21]. For the sake of simplicity, only the rosettes at the upper flange and web are taken into consideration because the cross-section is symmetrical.…”

Section: Residual Stress Testmentioning

confidence: 99%

Residual welding stress of I-section members beyond the limits of width-thickness ratio

Li¹,

Zhao²

2017

Frattura Ed Integrità Strutturale

View full text Add to dashboard Cite

Despite the extensive studies on the effect of width-thickness ratio and residual stress on member behavior, few scholars have probed into the residual stress distribution on the I-section members. Based on the principle of blind hole drilling, this paper conducts an experimental study of the residual welding stresses of eight welded I-shaped members. Through the analysis of the test results, the author draws the following conclusion: it is safe to use I-section members beyond the limits of width-thickness ratio because the residual stress distribution is not severely affected by width-thickness ratio.

show abstract

“…The steel constraint effect helps strengthen the strength of recycled aggregate concrete, while steel pipes with the filler of recycled aggregate concrete will not bend inwards as what hollow steel pipes tend to (Choi and Yun, 2012;Chen et al,2014;Cui et al, 2016;Wang et al,2015;Niu and Cao,2015).…”

mentioning

confidence: 99%

Experimental study on short eccentrically loaded column of recycled aggregate concrete filled square steel tube

Liu¹

2017

Revista de la Facultad de Ingeniería

View full text Add to dashboard Cite

To investigate the mechanical properties of recycled aggregate concrete filled square steel tubular column under bias voltage, and to analyze the effects of three influencing factors (steel ratio, eccentricity and different types of aggregates) on mechanical properties of test specimens. The experimental results indicated that recycled aggregate concrete filled square steel tubular column had high bearing capacity and excellent deformation performance, and its final fracture morphology was similar to that of common concrete-filled steel tube, which was bending failure. Steel ratio, eccentricity and different types of aggregates had significantly effects on the mechanical properties of bias column. Mid-span longitudinal strain distribution of the test specimens could basically satisfy the plane cross-section assumption, the calculated value according to standard GB 50936-2014 was close to the measured value, which was more suitable for calculating the bearing capacity of bias column.

show abstract

Early Hydration Kinetics of Cementitious Materials Containing Different Steel Slag Powder Contents

Cited by 7 publications

References 14 publications

Synergistic Excitation Mechanism of CaO-SiO2-Al2O3-SO3 Quaternary Active Cementitious System

Synergistic Excitation Mechanism of CaO-SiO2-Al2O3-SO3 Quaternary Active Cementitious System

Residual welding stress of I-section members beyond the limits of width-thickness ratio

Experimental study on short eccentrically loaded column of recycled aggregate concrete filled square steel tube

Contact Info

Product

Resources

About