Uniaxial compressive stress-strain curves of magnesium oxysulfate cement concrete

Zhu, Haiwei; Yu, Hongfa; Ma, Hongfang; Yang, Sanqiang

doi:10.1016/j.conbuildmat.2019.117244

Cited by 22 publications

(5 citation statements)

References 11 publications

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“…Measuring the compressive strength of concrete was advanced early by the uniaxial or triaxial tests as a traditional testing method [39][40][41][42][43]. Many industrial cases present measuring the compressive strength by uniaxial testing.…”

Section: Introductionmentioning

confidence: 99%

Resonant Frequency Ultrasonic P-Waves for Evaluating Uniaxial Compressive Strength of the Stabilized Slag–Cement Sediments

Lindh

Lemenkova

2021

Nordic Concrete Research

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Marine sediments can be stabilized by ultra high-strength binders: cement, Cement Kiln Dust (CKD) and slag. The properties of the stabilized soil indicate potential to their reuse. This study investigated the performance of the unconfined compressive strength (UCS) in the marine sediments stabilized by binder (cement, CKD, slag), tested by ultrasonic P-waves. Materials include 194 specimens collected from the port of Gothenborg. The experiment was performed in Swedish Geotechnical Institute (SGI). The UCS of specimens stabilized by different ratio of binders (cement, CKD, slag) was tested by resonance frequencies of the elastic P-waves. The significant increase in the UCS (>1500 kPa) was recorded for the highest values of CKD and cement, and low values of slag. The correlation profiles of low water/high binder (LW/HB) cement/slag (40/60%) were controlled by curing time. The slag–cement–CKD simplex tests demonstrated UCS of samples with low/high water content and various binder ratio of cement (kg/m3). The ratio of cement binder and curing time play a critical role in the increase of UCS followed by mechanical properties of specimens and intensity of stress. The highest values exceed 1000 m/s in P-waves. The results shown high accuracy (97%) and non-contacting approach for testing UCS of sediments. Seismic methods can be applied to test the UCS of the stabilized sediments, and also in-situ via seismic CPT, surface testing or cross hole seismic testing.

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Section: Introductionmentioning

confidence: 99%

Resonant Frequency Ultrasonic P-Waves for Evaluating Uniaxial Compressive Strength of the Stabilized Slag–Cement Sediments

Lindh

Lemenkova

2021

Nordic Concrete Research

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“…Nonetheless, the high final strength and high resistance to chemical degradation in chloride-rich environments that can be achieved using MOC cements have led to their application in various roles including flooring [50] and wallboards [51], as well as for ornamental purposes [38]. While these cements are generally not compatible with conventional steel reinforcement -particularly MOC due to high chloride content -they are suitable for use with lightweight bio-based fillers including waste wood [52], sawdust [53], or rice husks [54], and also as concretes with conventional dense or lightweight aggregates [55].…”

Section: Mg-oxysulfate / Mg-oxychloride Cementsmentioning

confidence: 99%

MgO-based cements – Current status and opportunities

Bernard,

Nguyen,

Kawashima

et al. 2023

RILEM Tech Lett

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The cement industry is a major contributor to the anthropogenic CO2 emissions, with about 8% of all emissions coming from this sector. The global cement and concrete association has set a goal to achieve net-zero CO2 concrete by 2050, with 45% of the reduction coming from alternatives to Portland cement, substitution, and carbon capture and utilization/storage (CCU/S) approaches. Magnesia-based cements offer a conceivable solution to this problem due to their potential for low-to-negative CO2 emissions (CCU/S) but also being alternatives to Portland cement. The sources of magnesia can come from magnesium silicates or desalination brines which are carbon free for raw-material-related emissions (cf. carbonated rocks). This opens up possibilities for low or even net-negative carbon emissions. However, research on magnesia-based cements is still in its early stages. In this paper, we summarize the current understanding of different MgO-based cements and their chemistries: magnesia oxysulfate cement, magnesia oxychloride cement, magnesia carbonate cement, and magnesia silicate cement. We also discuss relevant research needed for MgO-based cements and concretes including the issues relating to the low pH of these cements and suitability of steel reinforcement. Alternatives reinforcements, suitable admixtures, and durability studies are the most needed for the further development of MgO-based concretes to achieve a radical CO2 reduction in this industry. Additionally, techno-economic and life cycle assessments are also needed to assess the competition of raw materials and the produced binder or concrete with other solutions. Overall, magnesia-based cements are a promising emerging technology that requires further research and development to realize their potential in reducing CO2 emissions in the construction industry.

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“…It has the advantages of rapid solidification, early strength, high strength, high flexural strength, and high toughness because of a new phase 5Mg(OH) 2 •MgSO 4 •7H 2 O (also known as the 5•1•7 phase) [31]. Zhu et al [32] compared and analyzed the static mechanical properties of BMSC concrete and ordinary Portland cement (OPC) concrete through experiments. It was found that, at the age of 90 days, the strength of magnesia sulfate cement concrete with the same strength was increased by 23~28% compared to ordinary concrete, and the splitting tensile strength was increased by 27~121%.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Simulation on the Penetration for Basic Magnesium Sulfate Cement Concrete

Mei

et al. 2023

Materials

Self Cite

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The penetration resistance of the new material Basic Magnesium Sulfate Cement (BMSC) is studied through comprehensive application of an experimental and numerical simulation method. This paper consists of three parts. The first part introduces the preparation of Basic Magnesium Sulfate Cement Concrete (BMSCC) and the study of its dynamic mechanical properties. In the second part, on-site testing was carried out on both BMSCC and an ordinary Portland cement concrete (OPCC) target, and the anti-penetration performance of the two materials was analyzed and compared from three aspects: penetration depth, crater diameter and volume, and failure mode. In the last part, the numerical simulation analysis was carried out based on LS-DYNA, and the effects of factors, such as material strength and penetration velocity on the penetration depth, are analyzed. According to the results, the BMSCC targets have better penetration resistance performance than OPCC under the same conditions, mainly manifested in smaller penetration depth, smaller crater diameter and volume, as well as fewer cracks.

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Uniaxial compressive stress-strain curves of magnesium oxysulfate cement concrete

Cited by 22 publications

References 11 publications

Resonant Frequency Ultrasonic P-Waves for Evaluating Uniaxial Compressive Strength of the Stabilized Slag–Cement Sediments

Resonant Frequency Ultrasonic P-Waves for Evaluating Uniaxial Compressive Strength of the Stabilized Slag–Cement Sediments

MgO-based cements – Current status and opportunities

Experimental and Numerical Simulation on the Penetration for Basic Magnesium Sulfate Cement Concrete

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