Properties of Hardened Mortars Containing Crushed Waste Oyster Shells

ChenDa,; PanTao,; YuXiaotong,; LiaoYingdi,; Zhaohui,

doi:10.1089/ees.2018.0465

Cited by 17 publications

(22 citation statements)

References 24 publications

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“…WOS-F and WOS-M showed reductions of initial slump flow of 17.14% and 9.28% compared to WOS-C. The initial slump flow of the mortar was found to increase with the increase in the particle size of aggregate, which is consistent with the existing research conclusions [26]. The drop of initial slump flow caused by using WOS with a smaller particle size is mainly due to the larger antiparticle friction resulting from the more irregular surface and larger specific surface area of the particle.…”

Section: Stress-strain Curvessupporting

confidence: 90%

Particle Size Effect of Oyster Shell on Mortar: Experimental Investigation and Modeling

et al. 2021

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In order to solve the problem of lack of natural river sand, crushed waste oyster shells (WOS) were used to replace river sand. By replacing 20% river sand, WOS mortar with different particle sizes of WOS were made for the experiment. Through experimental observation, the initial slump and slump flow loss rate were studied. The effects of different particle sizes and curing times on the compressive strength, flexural strength, static elastic modulus, and dry shrinkage of WOS mortar were analyzed. The relationship formulas between the compressive strength, flexural strength, particle size, and curing age were proposed. The results showed that the setting time and slump flow decreased with a decrease in the particle size of WOS. It was also found that the mortar with fine crushed WOS had high compressive strength, flexural strength, and static elastic modulus at both early and long-term curing age. A formula was proposed to describe the development of the compressive strength with the particle size of WOS and curing time, and the relations among these mechanical properties were discussed. Furthermore, drying shrinkage increased when WOS was used and could not satisfy the standard requirement of 0.075%. In contrast, the addition of fine WOS and double-dose sulfonated naphthalene-formaldehyde superplasticizer (SNF SP) reduced the shrinkage rate of the mortar by 8.35% and provided better workability and mechanical properties for mortar.

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Section: Stress-strain Curvessupporting

confidence: 90%

Particle Size Effect of Oyster Shell on Mortar: Experimental Investigation and Modeling

et al. 2021

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“…The flexural and compressive strengths of mortar mixtures with and without oyster shell powder are greater than 5 and 17.2 MPa, respectively, meeting the engineering requirements of cementitious materials. The replacement of river sand with oyster shell powder up to 30% is viable from the environmental and economic viewpoints 34 …”

Section: Constructionmentioning

confidence: 99%

“…The replacement of river sand with oyster shell powder up to 30% is viable from the environmental and economic viewpoints. 34 Zhang et al 35 explored the partial or full replacement of natural coarse aggregates with discarded snail shells to prepare foamed concrete. The unit density of fresh concrete decreased significantly from 2440 to 1602 kg/m 3 as the shell replacement amount increased due to the smooth geometry of the shell particles.…”

Section: Soil Amendmentmentioning

confidence: 99%

Review of shell waste reutilization to promote sustainable shellfish aquaculture

Zhan

Wang

2021

Reviews in Aquaculture

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Shellfish aquaculture has developed rapidly, and the annual production of shell waste by‐products exceeds 10 million tons. The reutilization of shell waste is a severe problem in terms of environmental protection and the development of the circular economy. Due to its limited economic value, shell waste has generally been discarded or sent to landfill without any further processing and reutilization, thereby wasting resources and severely degrading the coastal ecosystem. This review summarizes recent research into the reutilization of shell waste, including applications in the fields of agriculture, construction, environmental protection, chemical production, food additives and biomaterials. Problems and strategies related to the reutilization of shell waste are analysed in order to provide technical support for the large‐scale and high value‐added utilization of shell waste.

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“…Cost-efficiency is an important indicator to evaluate the sustainability of the concrete material. The unit prices of raw materials were obtained from former research [5], which did not include the transportation, handling, placement, and quality control costs. The results of the cost-efficiency of different concrete mixtures are shown in Table 5.…”

Section: Cost-efficiencymentioning

confidence: 99%

“…At the same time, most studies about the WOS mortar or concrete only used the crushed WOS as part of the aggregates instead of using it as 100% fine aggregates [5,6].…”

Section: Introductionmentioning

confidence: 99%

The effectiveness of waste oyster shells (WOS) as major fine aggregate replacement in concrete

et al. 2021

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Over-exploitation of natural river sand and waste oyster shells (WOS) dumped randomly will cause serious environmental issues. Thus, a drive to using crushed WOS as fine aggregates to substitute river sand in concrete production has been initiated. This paper conducted experimental research to study the possibility of employing the crushed WOS as 100% fine aggregates in concrete. The workability, compressive strength and its size-effect, and sustainability performance of the concrete mixtures were investigated. The results indicated that, under the same water-cement ratio, the WOS concrete showed a great improvement in strength properties while a decline was found in slump tests, compared to the control concrete. Besides, the use of the crushed WOS in concrete production resulted in a modification in both eco-efficiency and cost-efficiency.

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Properties of Hardened Mortars Containing Crushed Waste Oyster Shells

Cited by 17 publications

References 24 publications

Particle Size Effect of Oyster Shell on Mortar: Experimental Investigation and Modeling

Particle Size Effect of Oyster Shell on Mortar: Experimental Investigation and Modeling

Review of shell waste reutilization to promote sustainable shellfish aquaculture

The effectiveness of waste oyster shells (WOS) as major fine aggregate replacement in concrete

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