Abstract: Sea sand concrete is a kind of concrete in which mixed sea sand as fine aggregate, which is large-scale application in the coastal areas in recent years, especially in Ningbo area. The sea sand solves the problem of river sand shortage, coupled with cheaper price, most of the ready-mixed concrete companies are willing to use desalted sea sand instead of river sand.
concrete is hereafter referred to as "sea water and unwashed sea sand concrete" Though the early strength of concrete containing sea water as mixing water is reported to be slightly higher in some of previous studies, the properties of concrete made using sea water and unwashed sea sand and containing a large amount of chloride ions and other ions derived from sea water have not been …
24-08-2019· The adopted mixing ratio of seawater:cement:sea sand:coarse aggregate was 0.45:1.00:1.50:2.50. It is worth noting that after the contained chloride ions in seawater added, the actual chloride ion ratio in the sea sand was equivalently updated to be 0.65%, which exceeded the allowed values in specifications ( ACI Committee 222, 2001 ; JASS 5, 1993 ; JGJ 52-2006, 2006 ) by …
USE OF SEA SAND FOR CONCRETE PRODUCTION: VIABILITY STUDY. August 2021; Revista Ifes ... The colorimetric tests to evaluate the penetration of chlorides in concrete, immersed in sea water for 7 ...
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 constituents and curing conditions.
Bond performance between FRP tubes and seawater sea sand concrete after exposure to seawater condition Milad Bazli, Xiao Ling Zhao, R. K. Singh Raman, Yu Bai, Saad Al-Saadi Research output : Contribution to journal › Article › peer-review
The Sea sand showed lower fineness modulus and bulk Dr. Tran Tuan Hiep (Vietnam), [4] The strength of density than the regular sand. Seven mix proportions were cement concrete using sea sand is less than traditional prepared. First was control mix (without Sea sand), and the cement concrete using river sand from 4 - 10%.
1- Sea sand tends to very fine and rounded, Smooth rounded particles would offer less resistance to rearrangement than angular or elongated particles with rough surfaces. 2- In sea water, chloride is present which will cause corrosion of steel and iron which ultimately leads to reducing the carrying capacity of steel and iron, so that the structure built using this may not be sustainable.
In this context therefore, sea sand is not prohibitive for concrete. As regards chloride content, there are various views and the standards also differ considerably on the extent of chlorides content.
Sea sand is one such alternative tried as fine aggregate in many countries. The present paper reviews the current status of utilization of sea sand as fine aggregate in concrete and its effect on ...
30-11-2017· Generally, compared to ordinary concrete, sea-sand concrete has a lower freeze-thaw resistance, experiences greater amounts of drying shrinkage mainly due to the chloride and the seashell contents in sea-sand, but these substances have little effect on the carbonation process.
Using fibre reinforced polymer (FRP) composites together with seawater and sea sand concrete (SWSSC) in coastal areas will overcome the environmental issues of using ordinary concrete and corrosion problems of conventional steel reinforcements.
Sea sand can be used in concrete when regular sand is not available. The main worry is about the durability related properties as the sea sand has large amount of salts adhered on the its surface.
The properties of concrete made with washed and unwashed sea dredged sand by using potable and seawater for mixing were evaluated and compared with those determined for concrete made by using normal sand and potable water. The study has shown very encouraging results. The authors report the details of this study and offer arguments based on ...
sea sand for construction, especially, using sea sand to make the cement concrete is aimed to exploit maximally the potential of a local material being available, cheap for
08-03-2021· Sea-sand concrete was mainly subjected to chemical seawater attack in the submerged zone and non-submerged zone. Thermodynamic simulation showed that when the cement paste was attacked by seawater, the cement paste would expand first, and then portlandite and C-S-H would decompose. Ettringite was the main expansive phase for external seawater attack.
Effects of sea-sand and/or seawater on the properties of concrete are summarised. • Admixtures can enhance the performance of concrete with sea-sand and/or seawater. • Combination of sea-sand seawater concrete with FRP leads to sustainable structures. • Sea-sand seawater concrete incorporating recycled coarse aggregate is attractive. •
Sea sands from four different places were used to make concrete which were then compared to concrete made of river sand. The concrete strengths are 20, 40, and 60 MPa.
Seawater may carry sand and silt especially at the shallow end of the sea. When it forcibly contacts the concrete surface abrasion occurs. Abrasion also occurs due to mechanical force buy wave action. Theoretical Aspects If concrete structure is built in seawater, then the most affected area of the structure is well above the high water mark.
The application of sea sand is a systematic project, involving multiple links such as concrete raw materials, mix ratio, construction process supervision, and post-maintenance. In order to prevent sea sand from being improperly used in the project, it is necessary to strengthen the supervision of all aspects of the use of sea sand.
The rapid growth in development of construction industry is leading to an increase in utilization of natural resources like river sand due to which there has been a much scarcity in availability for construction. This overuse should be balanced by
Sea sand can be used in concrete when regular sand is not available. The main worry is about the durability related properties as the sea sand has large amount of salts adhered on the its surface.
21-12-2020· Seawater and sea sand concrete (SWSSC) filled ultra-high performance concrete (UHPC) tube (SFUHPC tube) column is a cement-based tubular composite column, which combines the excellent compressive strength and toughness of UHPC and lateral …
SEA SAND AS FINE AGGREGATE FOR CONCRETE PRODUCTION SAMRAJ P ME (CMASE) Under the guidance of Dr.V.NAGARAJAN OBJECTIVE • To find out a suitable method to reduce the salinity in the sand to the permissible level and to study the properties of concrete made with sea sand.
CDE Mariner range of sea sand washing plant can treat upto 350tph sand for production of both concrete sand and plaster sand (depending on feed gradation) as per BS 882:1992 specification. In keeping with the core competency of CDE, the plants are skid mounted and require minimum foot print leading to low unit power consumption and minimum man power.
sea sand is ideal for concrete and plastering activities. When compared with river sand concrete, 50 and replacement of sea sand with river sand in concrete gives lesser in compressive, ) ) …
06-05-2016· Sea sand and Washed sea sand were collected from a stock pile at Nagapattinam district coasts, Tamilnadu, India. Maximum chloride content of 0.075 % by weight of sand could be deemed acceptable for all reinforced concrete work using a 20 mm max. aggregate size and Portland cements.
08-03-2021· Sea-sand concrete was mainly subjected to chemical seawater attack in the submerged zone and non-submerged zone. Thermodynamic simulation showed that when the cement paste was attacked by seawater, the cement paste would expand first, …