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Sep 08, 2019· Viswajyothi College of Engg & Technology. Abstract This paper highlights the study of using sea-sand and sea-water in concrete construction in replacement of fresh water and river sand. Presence of chloride and sulphate in sea sand and sea water was compromised by using a combination of fly ash, blast furnace slag cement and chemical …
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Oct 14, 2022· Why Undesalinated Sea Sand Can't Be Used in Concrete. October.14,2022. Chloride ions in concrete mainly come from chloride salts (one of cement raw materials), sand, water, and admixtures. If the chloride ion content exceeds the standard, the steel bars in the concrete will be easily corroded, which will reduce the chemical resistance, wear ...
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Jul 03, 2019· The development of ultra-high-performance seawater sea-sand concrete addresses the challenges associated with the shortage of freshwater, river-sand and coarse aggregate in producing concrete for a marine construction project. When used together with corrosion-resistant fibre-reinforced polymer composites, the durability of the resulting ...
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Dec 28, 2020· The specifications compiled by the Japanese Civil Engineering Society stipulate that for reinforced concrete with high durability requirements, the total amount of …
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Jun 01, 2022· Sea sand containing sulfate and chloride; two main factors causing damage to the concrete structure. The reaction of calcium silicate hydrate (C–S–H) and sulfate …
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Dec 12, 2020· Chemical properties of sea sand were analyzed using a scanning electron microscope and the physical properties were observed using an optical microscope. The …
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Oct 01, 2021· The electrochemical method was carried to investigate characteristic parameters of steel corrosion in concrete with sea sand and washed sea sand, under wetting-drying regime in which the 3.5% NaCl solution and sea water were selected as aggressive resource. The results show that the development of absolute corrosion …
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： The effects of fine aggregates on the performance of cement mortar was studied,and use the sea sand as the fine aggregates to prepared the high-performance concrete,relative experimental studies on the workability,mechanical properties and durability are respectively carried out.The results showed that the compressive strength …
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Mar 08, 2021· In the marine environment, concrete in both submerged zone and non-submerged zone could be attacked by seawater. To study the deterioration of sea-sand concrete partially submerged in seawater, an accelerated test with simulated marine environment was designed for seawater and siliceous sea-sand concrete (SSC), coral …
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Aug 22, 2022· Due to its economic benefit and environmental friendliness, seawater sea-sand concrete (SSC) has much potential to replace conventional concrete in the future. However, the mechanism of SSC after freeze–thaw cycles (FTCs) is obscure. This paper reports the results of an experimental investigation on the cyclic compressive …
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Dec 12, 2020· The concrete samples were cured in natural marine conditions and atmospheric conditions and tested at 7 and 28 days. Sea sand–seawater concrete had a high early compressive strength at 7 days and remained slightly higher than conventional concrete at 28 days. The experimental procedure used all natural, unaltered, concrete …
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Jul 27, 2020· Many studies (Katano et al., 2013; Ramaswamy et al., 1982) have observed that a concrete with seawater and/or sea sand exhibited a more rapid compressive strength development during its early age than ordinary concrete.The compressive strength increase could last for 28 days (Islam et al., 2012) to 5 years (Mohammed et al., 2004).A number …
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Aug 09, 2021· Seawater sea-sand concrete (SSSC) refers to concrete prepared with seawater and/or sea-sand instead of freshwater and/or river-sand. It generally sets faster due to the exist of chloride but demonstrates slightly lower long-term strength compared to ordinary concrete due to the effect of the sulfate or impurities [3], [4] .
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Nov 16, 2022· This research is intended to utilize Nambo sea sand and Nambo excavated sand to make concrete bricks. Test objects are made to test the compressive strength and absorption of water. This research result concludes that concrete brick material from Nambo sea sand and Nambo excavated sand is suitable for use as a wall material because it …
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The use of sea sand and seawater in concrete can provide sustainability to natural resources, while improving the mechanical properties of concrete. The corrosion of steel-reinforcement is inevitable with the use of sea …
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Aug 29, 2019· ABSTRACT The population worldwide is growing and so is the demand for more infrastructure. The rate of consumption of concrete has grown significantly over the years, becoming one of the most fundamental construction materials. This growth has depleted natural river sand and freshwater sources. The use of sea sand and seawater …
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Feb 24, 2014· It is just a matter of gathering up the beach sand, using the salt water to mix the Portland Cement and constructing the Ecoshell I. One consideration during the construction process is the fact that salt water …
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Chloride attack is one of the factors affecting durability of concrete. Sea sand contains chloride ions beyond the acceptable limit causes sever durability issues. Therefore, much attention is required when offshore …
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Seawater sea sand concrete–filled glass fibre-reinforced polymer tubular stub columns were exposed to an indoor environment (i.e. aged in air at room temperature) for a maximum duration of 2.5 years and no degradation was found by comparing the axial compressive test results from unexposed and exposed specimens. Seawater sea sand concrete ...
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Apr 21, 2022· The durability of a concrete structure is affected by temperature cycles that occur during the structure's service life. This paper presents an experimental and theoretical study of the mechanical properties of seawater sea-sand concrete when exposed to temperature variations. By using compressive tests on cylindrical concrete specimens, …
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Concrete made with sea sand is believed to be used in the construction of China's tallest building. The project has now been suspended, but the discovery rai...
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Nov 30, 2017· DOI: 10.1016/J.CONBUILDMAT.2017.08.130 Corpus ID: 139457714; Use of sea-sand and seawater in concrete construction: Current status and future opportunities @article{Xiao2017UseOS, title={Use of sea-sand and seawater in concrete construction: Current status and future opportunities}, author={Jianzhuang Xiao and …
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Feb 21, 2021· The present paper provides comprehensive evaluation of utilization of sea sand in concrete and emphasises the need for further research on sea sand as fine aggregate in concrete. Key words: Sea ...
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1.Introduction. The current trend in marine engineering construction is to use available materials such as seawater, sea sand, and coral aggregate on an island to prepare seawater sea sand concrete or coral concrete,, .This alleviates a shortage of fresh water and river sand resources while lowering engineering costs and shortening the …
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May 01, 2019· Hence micro silica is used in sea sand concrete possesses higher compressive, split tensile, flexural strength than the conventional concrete. In our test programmes the specimens were casted and remoulded after 24 hours and were cured in a curing pond till and date of testing. The specimens used for the test included cube for …
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Nov 30, 2017· To regulate the use of sea-sand and minimize related construction quality problems, various countries have published standards and specifications, such as the …
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Sep 08, 2019· Abstract This paper highlights the study of using sea-sand and sea-water in concrete construction in replacement of fresh water and river sand. Presence of chloride …
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the sea sand pumped from a distance of about ten kilometers is very suitable for building construction industry. This study is to experiment the suitability to use beach/sea sand as a substitute for river sand as fine aggregate for concrete. Keywords: Concrete, Sea sand and Fine aggregate. 1. INTRODUCTION
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The sea sand has similar properties compared to the river sand. The biggest problem with sea sand is the chloride content that will cause reinforcing to corrode, accept maybe if the concrete is of ...
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Jan 01, 2021· Using sea sand to produce building materials is a general trend, such as sea sand concrete. In this paper, using sea sand and river sand to make concrete, and comparing the performance of them.
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DOI: 10.1016/J.CONBUILDMAT.2021.123602 Corpus ID: 236310809; A review on seawater sea-sand concrete: Mixture proportion, hydration, microstructure and properties @article{Zhao2021ARO, title={A review on seawater sea-sand concrete: Mixture proportion, hydration, microstructure and properties}, author={ Zhao and Xiang Hu …
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Jun 01, 2022· Sea sand containing sulfate and chloride; two main factors causing damage to the concrete structure. The reaction of calcium silicate hydrate (C–S–H) and sulfate can also form Thaumasite (CaSiO 3 ·CaCO 3 ·CaSO 4 · 15H 2 O) in concrete through in the presence of carbonate ions; the formation of thaumasite could cause spalling, softening ...
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Answer (1 of 10): Concrete always needs river sand, and not sea sand. Why? Well… Yes and no. The goal of good concrete design is to have successively smaller particles fitting between the larger particles. River sand does not necessarily fulfill that goal in an economically justified manner. I...
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Answer (1 of 7): Sea sand comes from the disintegration of sea corals as a result of the action of waves. It generally has much lesser density compared to sand from other sources, therefore not ideal to be used in concrete. A good concrete mixture needs to have strong course and fine aggregates (...
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Dec 23, 2020· Furthermore, promising results of using supplementary cementitious materials (SCMs), specially blast furnace slag (BFS) in increasing durability of concrete …
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Sea sand (also known as Offshore or Marine Sand) has found application in coastal areas in some countries. The main extracting countries are the Netherlands, followed by the United Kingdom, Denmark and France. In …
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Oct 20, 2021· Why Sea sand is not being used for Mortars and Concrete. Sea sand should not be used to make mortar and concrete for the following reasons: 1. It contains salt and therefore the structure remains damp. The mortar is affected by efflorescence and then blisters appear. 2.
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Sep 30, 2021· 1. Introduction. In response to the shortage of resources caused by huge increase in demand for infrastructure and hence construction materials in the large-scale industrial world, seawater and sea sand concrete (SWSSC) is an attractive alternative to the ordinary Portland cement (OPC) concrete [1,2,3,4,5].SWSSC is deemed as a new …
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