Research on Influence of Chloride Ion in Sea Sand on the Performance of Concrete

2012 ◽  
Vol 174-177 ◽  
pp. 444-447
Author(s):  
Guo Liang Zhang ◽  
Li Wei Mo ◽  
Jian Bin Chen ◽  
Jun Zhe Liu ◽  
Zhi Min He
Keyword(s):  
Large Scale ◽  
Concrete Strength ◽  
Chloride Ion ◽  
Fine Aggregate ◽  
Strength Measurement ◽  
River Sand ◽  
Mortar Strength ◽  
Sea Sand ◽  
Wide Range ◽  
Ready Mixed Concrete

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. Many companies even are using sea sand without any treatments.In Ningbo sea sand concrete using wide range of usage is not optimistic. This survey and analysis in Ningbo area physical characteristics of concrete using sea sand and sea-sand. On this basis, chloride simulating sea sand, mixed with desalted sea sand, not desalted sea sand mortar strength measurement, the concrete strength rule were analyzed, and discovered the early strength for the sea sand concrete by the presence of chloride.

Study on the Chloride Contents of Sea Sand in Ningbo

2011 ◽  
Vol 250-253 ◽  
pp. 257-261
Author(s):  
Jun Zhe Liu ◽  
Jian Bin Chen ◽  
Guo Liang Zhang ◽  
Zhi Min He
Keyword(s):  
Fly Ash ◽  
Large Scale ◽  
Fine Aggregate ◽  
Comparison Analysis ◽  
River Sand ◽  
Fly Ash Concrete ◽  
Mortar Strength ◽  
Sea Sand ◽  
Early Strength ◽  
Coastal River

This paper is to study the sand concrete, sand is mixed with sand as fine aggregate in concrete, in recent years by large-scale applications in the coastal areas, especially in Ningbo, a coastal river sand shortage is resolved this problem, coupled with low prices, most of the commercial concrete companies are willing to play down the use of sand instead of river sand, the paper surveys and analyzes the use of sea sand in Ningbo and the physical characteristics of sea sand, on this basis, simulates sand chloride doped, dilute sea sand, not dilute sand sea sand and fly ash concrete mortar strength was measured to analyze the strength of law, by comparison analysis, the presence of chloride in the early strength concrete sand.

Mechanical behaviors of GFRP tube confined recycled aggregate concrete with sea sand

2020 ◽  
pp. 136943322097477
Author(s):  
Yijie Huang ◽  
Jianzhuang Xiao ◽  
Li Qin ◽  
Peng Li
Keyword(s):  
Concrete Strength ◽  
Chloride Ion ◽  
Deformation Curve ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Experimental Program ◽  
Mechanical Behaviors ◽  
River Sand ◽  
Aggregate Concrete ◽  
Sea Sand

An experimental program was undertaken to study the mechanical behaviors of glass fiber-reinforced polymer (GFRP) tube confined recycled aggregate concrete with sea sand (GRACSS) under the axial compression. Two different parameters were mainly considered: recycled coarse aggregates (RCA) replacement percentage (0, 100%) and type of sand (sea sand, river sand). Typical influences of RCA and sea sand on the strength, the deformation and the load–deformation curve of GRACSS were investigated. The test results showed that the failure pattern of GRACSS was similar to that of GFRP tube confined ordinary concrete (GCOC). The strength of GRACSS decreased with an increasing RCA replacement percentage, while sea sand could reduce the negative effect of RCA. It is also found that the peak deformation of GRACSS increased with the increasing RCA replacement percentage whereas with decreasing sea sand chloride ion (Cl–) content. The stiffness of the specimen was obviously influenced by the concrete type. Research findings indicated that the axial load-deformation curve of GRACSS can be divided into elastic-plastic and hardening stages. An analytical expression was proposed to calculate the load-deformation curve of GRACSS. Finally, the finite element method (FEM) was applied to study the effects of outer tube thickness, concrete strength, RCA replacement percentage and Cl– content in sea sand on the mechanical behaviors (strength and deformation) of GRACSS.

Study on the Strength of Sea Sand Concrete in Ningbo

2011 ◽  
Vol 250-253 ◽  
pp. 262-265
Author(s):  
Jun Zhe Liu ◽  
Guo Liang Zhang ◽  
Jian Bin Chen ◽  
Zhi Min He
Keyword(s):  
Fly Ash ◽  
Influence Factor ◽  
Concrete Strength ◽  
Chloride Ion ◽  
Strength Development ◽  
Term Strength ◽  
Two Phase ◽  
Sea Sand ◽  
Early Strength

This paper mainly explain and expounded folding compressive strength of the different types of sea sand mortar , fly ash to the sea sand concretes mortar intensity influence as well as the chloride ion content to the sea sand concretes mortar intensity influence. The pulverized fly ash has the postponement function to the sea sand concretes early strength, the chloride ion has the promoter action to the sea sand concretes early strength. 20% pulverized fly ash be good to the sea sand concretes long-term strength development influence, can achieve the goal which enhances the sea sand concretes the long-term strength . The chloride ion is greater to the concretes early strength influence, especially in previous 3 days. Along with the time development, the chloride ion influence weakens, but the pulverized fly ash enlarges to the concretes intensity's influence factor. A two-phase arrived, the final concrete strength values close to each other.

Research on the Properties of Sea Sand Mortar

2013 ◽  
Vol 405-408 ◽  
pp. 2871-2875
Author(s):  
Yi Fan ◽  
Rong Hui Zhang ◽  
Zhen Bei Chen
Keyword(s):  
Large Scale ◽  
Building Materials ◽  
Cement Mortar ◽  
Colloidal Crystal ◽  
Low Cost ◽  
Scale Construction ◽  
River Sand ◽  
Sea Sand

With the city's large-scale construction, there have been a shortage of river sand in some areas. So, abundant, low-cost sea sand gradually being used in construction. However, sea sand can not be directly applied to the production of building materials, such as building mortar. Sea sand must be desalted and admixtures must be added to the sea sand mortar. In this paper, using a variety of sand to make cement mortar, and comparing the performance of them. Studies have shown that, compared with the ordinary mortar, the strength and the durability of the sea sand mortar modified by colloidal crystal have improved significantly.

Utilization of Fine Recycled Aggregate and the Calcareous Fly Ash in CLSM Manufacturing

2014 ◽  
Vol 1054 ◽  
pp. 199-204 ◽  
Author(s):  
Wojciech Kubissa ◽  
Roman Jaskulski ◽  
Jacek Szpetulski ◽  
Anna Gabrjelska ◽  
Ewelina Tomaszewska
Keyword(s):  
Fly Ash ◽  
Fine Fraction ◽  
Recycled Concrete ◽  
Recycled Aggregate ◽  
Concrete Aggregate ◽  
Fine Aggregate ◽  
Recycled Concrete Aggregate ◽  
River Sand ◽  
Wide Range ◽  
Strength Material

In the article the possibility of utilization of two waste materials: Recycled Concrete Aggregate (RCA) fraction 0-2 mm and Class C fly ash (from lignite burning power plant) in Controlled Low-Strength Material (CLSM) was presented. The research covered twelve different mixtures. The mixtures differed in cement and fly ash content as well as content of the fine aggregate. As a fine aggregate 0-2 mm fraction of RCA or river sand were used. The results showed that use the fine fraction RCA instead of sand does not cause technological problems and allows, depending on the needs, obtaining the material with different properties and a wide range of applications.

scholarly journals Analysis Of Use Sea Sand as A Fine Aggregate Replacement To Strong Press Concrete

2021 ◽  
Vol 1 (3) ◽  
pp. 1-6
Author(s):  
Fachrul Arya Sanjaya ◽  
Sapto Budy Wasono ◽  
Diah Ayu Restuti Wulandari
Keyword(s):  
Compressive Strength ◽  
Building Material ◽  
Fine Aggregate ◽  
River Sand ◽  
Concrete Material ◽  
Sea Sand ◽  
Concrete Cylinders ◽  
Compressive Strength Of Concrete ◽  
Average Compressive Strength

Concrete is a composite building material made from a combination of aggregate and cement. The limitation of concrete material, in this case, is a fine aggregate (river sand). The utilization of sea sand as an alternative to fine aggregate in the manufacture of concrete is     motivated by the availability of sea sand in nature in very large quantities. This study aims to determine the comparison and how much the compressive strength of concrete produced when using sea sand. The test was carried out when the specimens were 7, 14, and 28 days old with the specimens used in this study were concrete cylinders with a diameter of 15 cm and a height of 30 cm. The results showed that the use of sea sand as a substitute for fine aggregate showed an average compressive strength in 7 days of 18.86 MPa, an average compressive strength of 14 days of 25.52 MPa, an average compressive strength of 28 days of 29.00 MPa. Then for the average compressive strength value of the use of river sand in 7 days is 17.17 MPa, the average compressive strength of 14 days is 23.24 MPa, the average compressive strength of 28 days is 26.41 MPa.

scholarly journals Investigation on Compressive Characteristics of Steel-Slag Concrete

Materials ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 1928 ◽  
Author(s):  
Thi-Thuy-Hang Nguyen ◽  
Duc-Hung Phan ◽  
Hong-Ha Mai ◽  
Duy-Liem Nguyen
Keyword(s):  
Compressive Strength ◽  
Coarse Aggregate ◽  
Concrete Strength ◽  
Research Work ◽  
Steel Slag ◽  
Shape Effect ◽  
Fine Aggregate ◽  
River Sand ◽  
A Value ◽  
One Year

The compressive characteristics of the steel-slag concrete were investigated through an experimental test. The term “steel-slag concrete” in this research work was defined as a kind of concrete using steel-slag material as a coarse aggregate replacement. Three types of the steel-slag concretes were examined under compression as follows: XT01, XT02, XT03 with their cement/water ratios of 1.76, 2.00, 2.21, respectively. The coarse aggregate used in producing concrete was steel-slag material, while the fine aggregate was traditional river sand; the ratio of coarse aggregate to fine aggregate was kept constant at a value of 1.98. Firstly, the age-dependent compressive strength of the steel-slag concretes were investigated up to one year; it was clear that the concrete strength increased rapidly in 7 days, then more and more slowly after that. Secondly, the modulus of elasticity and Poisson’s ratio of the steel-slag concretes were explored at the 28-day age. Thirdly, there was an important size and shape effect on the compressive strength of the XT02, and its significance of brittleness in failure was analytically analyzed. Lastly, the effects of water amount added in the XT02 on its compressive strength and slump were evaluated at the 28-day age.

scholarly journals Utilisation of Seasand as Partial Replacement of Fine Aggregrate to Strengthen the Concrete

2020 ◽  
Vol 9 (5) ◽  
pp. 891-894
Keyword(s):  
Construction Industry ◽  
Coarse Aggregate ◽  
Construction Material ◽  
Strength Properties ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
River Sand ◽  
Sea Sand ◽  
Quarry Dust

Concrete is an important construction material widely used in the construction industry nowadays. It is blended material consisting of cement, fine aggregate, coarse aggregate and water. Generally the use of river sand as fine aggregate in our country is very widespread in industry. This paper mainly focuses on the study of strength properties of concrete in which river sand is replaced with sea sand as fine aggregate. In addition to it, Quarry Dust when added gains strength. Different mix proportions was replaced partially in 5%, 10%, 15% by Sea sand and Quarry dust. The strength of concrete for various mix proportions are carried out and tested for 14, 28, 56 days of curing. From the results obtained, with the replacement of river sand by sea sand along with well graded quarry dust upto to 15% increases the strength of concrete.

scholarly journals Bond Behavior between BFRP Rebar and Seawater Sea Sand Concrete

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Chao Wu ◽  
Bing-Chen Meng ◽  
Xianfeng Cheng ◽  
Asghar Habibnejad Korayem ◽  
Lik-Ho Tam
Keyword(s):  
Fly Ash ◽  
Failure Modes ◽  
Concrete Strength ◽  
Basalt Fiber ◽  
River Sand ◽  
Promising Alternative ◽  
Bond Slip ◽  
Bond Behavior ◽  
Ordinary Concrete ◽  
Sea Sand

Seawater sea sand concrete (SWSSC) is a promising alternative to ordinary concrete in terms of saving valuable natural resources of freshwater and river sand. Basalt fiber reinforced polymer (BFRP) rebars can be a good solution to corrosion of steel rebars in SWSSC. This paper presents an experimental study on the bond behavior between SWSSC and BFRP rebars through pullout testing. Concrete mixed with freshwater and river sand was also prepared for comparison with SWSSC. BFRP rebars with two different surface configurations were selected, that is, ribbed surface and sand-coated surface. Fly ash as a replacement of cement was also investigated in terms of its effect on bond behavior. Failure modes, bond-slip relationships, and bond strengths were reported and discussed in terms of the previously mentioned parameters. It was found that ribbed surface of BFRP rebar could achieve better mechanical interlocking with surrounding concrete. SWSSC could have comparative bond strength with BFRP rebar compared with ordinary concrete. However, using fly ash to replace cement is not recommended because it would significantly reduce concrete strength leading to much lower bond at the interface between SWSSC and BFRP rebar.

scholarly journals Influence of Coconut Fiber and Shell on Concrete

2020 ◽  
Vol 6 (8) ◽  
pp. 7-14
Keyword(s):  
Large Scale ◽  
Coarse Aggregate ◽  
Construction Material ◽  
Constructional Material ◽  
Coconut Shell ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
The People ◽  
Wide Range ◽  
Concrete Production

Concrete is a Composite material which is composed of Cement, fine aggregate, coarse aggregate binded together with a definite proportion of water. Concrete is widely used in every single construction work around the world. Due to large scale construction activities using conventional coarse aggregate such as granite as a constructional material extreme reduction in the natural stone deposit has been encountered and is affecting the environment, hence causing ecology imbalance. In current situation of construction, price factor and the wide range of extraction and processing of materialsis matter of great concern for the people as well as environment. Therefore, introduction of alternate waste material in place of natural aggregate in concrete production not only protects environment but also make concrete a suitable, economical and environment friendly construction material. Different material like Coconut Shell and Fiber can also be used alternatively. In this project Coconut Shell and fiber are used as partial replacement for coarse aggregate as well as fine aggregate, respectively. To study characteristic properties of concrete 10% and 20% for coarse aggregate and 1%, and 2% for fine aggregate are replaced by its weight with coconut shell and fiber.

Sign in / Sign up

Export Citation Format

Share Document