Experimental study on stress-strain curves of seawater sea-sand concrete under uniaxial compression with different strain rates

Zhang, Kaijian; Zhang, Qingtian

doi:10.1177/1369433220958765

Cited by 13 publications

(4 citation statements)

References 35 publications

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“…This may be achieved due to fines in the manufacture of more paste volume. The compressive strength of mortar using M-Sand is consistently higher for all the mixes [23].…”

Section: Mechanical Properties Of Mortar 331 Compressive Strength For...mentioning

confidence: 84%

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Influence of marine sand as fine aggregate on mechanical and durability properties of cement mortar and concrete

Ganesan¹,

Kanagarajan²,

Regin³

2022

Mater. Res. Express

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Concrete is commonly manufactured using river sand and manufactured sand (M-Sand) as fine aggregates. As river sand has more scarcity, M-Sand is now the preferred fine aggregate. For reduce the consumption and extraction of natural aggregate (river sand), this paper presents washed marine sand (MS) as an alternative fine aggregate that can replace M-Sand. The purpose of this research is to examine the mechanical, micro-structural and durability properties of concrete and cement mortar made with MS as a fine aggregate in partial replacement of M-Sand from 20% to 100%. For better understanding the characteristics of MS and M-Sand, physical properties of MS and M-Sand, as well as the chemical properties of washed and unwashed marine sand are compared. The experimental tests for mechanical properties of compressive strength, elastic modulus, split tensile strength and flexural strength, durability properties of RCPT, sorptivity, acid resistance, alkali attack and water absorption are investigated for cement mortar and concrete. According to this result, 60% of MS meets the desired durability and strength properties. Furthermore, microstructural properties such as EDX and SEM analysis are also carried out to further verify that MS as an alternate fine aggregate.

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“…This may be achieved due to fines in the manufacture of more paste volume. The compressive strength of mortar using M-Sand is consistently higher for all the mixes [23].…”

Section: Mechanical Properties Of Mortar 331 Compressive Strength For...mentioning

confidence: 84%

“…From figure 10, it is clear that the peak stress rises as strain rate rises [23]. The behaviour of stress-strain for the various mixes begins with a straight line, indicating that stress-strain values are proportionate.…”

Section: Elastic Modulus or Modulus Of Elasticitymentioning

confidence: 92%

Influence of marine sand as fine aggregate on mechanical and durability properties of cement mortar and concrete

Ganesan¹,

Kanagarajan²,

Regin³

2022

Mater. Res. Express

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“…The test results of Group 7 further indicate that using seawater and sea-sand increased the concrete mixture’s early-age strength, but has less effect beyond 56 days. Zhang et al (2021) has previously concluded that this is mainly because chloride and sulfate ions catalyzes the hydration reflection, which can significantly improve the concrete’s early properties.…”

Section: Experiments Program and Test Resultsmentioning

confidence: 99%

Mechanical properties and environmental performance of seawater sea-sand self-compacting Concrete

Yang

Xie

et al. 2022

Advances in Structural Engineering

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Due to the constituted ingredients are both rich in reserves, seawater sea-sand self-compacting concrete (SWSS-SCC) today has been treated as an ideal material in constructing island and coastal structures. The technique feasibility of applying SWSS-SCC in real engineering has been recognized by investigating the material properties, but its environmental impacts (EIs) has rarely been concerned at current stage. Under such a background, a refined life cycle assessment model of SWSS-SCC was developed in this study based on the China’s latest production data. Life cycle phases considered include extracting and preparing raw materials, component material production, mixing concrete and transportation occurred in the whole processes. After verifying the model, the impacts of several factors like concrete curing method, fly ash incorporation content, sea-sand transportation distance and electricity generation approach, which have never been investigated before, on the energy cost and carbon dioxide equivalent emissions generated in manufacturing SWSS-SCC were discussed. The simulated results showed that: (a) Using seawater and sea-sand slightly increases the concrete’s compressive and tensile strengths. Replacing some cement with fly ash notably decreases the early-age strengths, but curing at 60°C can offset that effect. (b) Replacing fresh water and natural sand by sea-water and sand in Humen Town decreases the production EIs of SWSS-SCC. For this concrete, cement production and raw material transportation are the main contributors to the overall EIs. (c) During producing SWSS-SCC, using electricity generated from clean fuels can effectively reduce the system’s EI, but changing fuel used to fire the cement kiln has little effect. (d) High temperature curing to increase the fly ash content is not environmentally sound. Reducing the mixture’s water to binder ratio is more benefit for incorporating fly ash. (e) From an environmental evaluation view, applying SWSS-SCC is more ecological in island constructions than coastal buildings.

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“…In recent years, some achievements have been made in the study of seawater sea sand concrete. Xiao et al [3][4][5] reported many studies about mechanical behavior of seawater sea sand concrete. Huang et al [6] and Wu et al [7] studied the influence of mineral admixture on the performance of seawater sea sand concrete.…”

Section: Introductionmentioning

confidence: 99%

Strength prediction of seawater sea sand concrete based on artificial neural network in python

Zheng

Qiu

2022

Mater. Res. Express

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Based on the artificial neural network method, the nonlinear mapping between the 28d compressive strength of seawater sea sand concrete and concrete water-cement ratio, cement content, and the sand ratio was established in Python. The results showed that with reasonable network settings, the fitting of the model training was good, and the prediction results were satisfactory. The mean relative error of prediction results was 3.16%, and the correlation coefficient was 0.974. Therefore, it is possible to use an artificial neural network to set up a compressive strength prediction model for seawater sea sand concrete. Compared with the traditional mix design method, the artificial neural network design method can decrease the number of mixing proportion adjustments and reduce the waste of labor, time, and materials.

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Experimental study on stress-strain curves of seawater sea-sand concrete under uniaxial compression with different strain rates

Cited by 13 publications

References 35 publications

Influence of marine sand as fine aggregate on mechanical and durability properties of cement mortar and concrete

Influence of marine sand as fine aggregate on mechanical and durability properties of cement mortar and concrete

Mechanical properties and environmental performance of seawater sea-sand self-compacting Concrete

Strength prediction of seawater sea sand concrete based on artificial neural network in python

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