— 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 ...

The first step in optimizing concrete is to recognize that concrete is no longer simply cementitious materials, aggregates and water. It is a high performance material with not just four, but seven essentials – consisting of water, cementitious material, sand, gravel, chemical admixtures, additives and fiber reinforcement.

 — Mineral additives such as coal fly ash cement (FAC) and blast-furnace slag (BFS) do not clearly decrease the pH in the surface region, as surface pH after 5 months of aging are still >12 [4]. ... Therefore, when constructing oceanic island and reef foundations, this type of seawater sea-sand concrete is preferred due to its improved ductility ...

 — The paper presents the research results of the influences of some adhesive types on the properties of reinforced concrete using local materials such as sea sand …

 — Overview on Cement and cement types, its manufacturing process and mineral additives. Looking for cements and cement additives? Cement is a binding that sets, hardens, and adheres to other material to bind them together. It is manufactured through a closely controlled chemical combination of calcium, silicon, aluminum, iron …

 — This study investigates the compressive strength of ordinary Portland cement mortar prisms with rice husk ash (RHA). Pit sand–cement, and sea sand-cement mortar prisms were separately prepared ...

 — Sea sand concrete may potentially face the risk of alkali-aggregate reaction, but there is limited research on this topic. More in-depth studies are required to understand the potential risks and to propose corresponding prevention and control measures. ... When MK is used as a mineral additive, the cured concrete's compressive strength is ...

 — For concrete based on seawater and sea sand mixed with admixture, the downward trend of late strength is significantly delayed, the late strength of concrete based on the seawater and sea sand ...

 — The combined use of seawater and sea sand is also found to increase the seven days compressive strength of concrete by 36–76%, but 28 days strength is approximately the same, and strength at 180 days is 3.7–10.2% lower when compared with freshwater concrete (Xiao et al., 2019).

 — The current specifications for RAC in structural engineering primarily focus on the application of RAC prepared with RCA, with limited attention given to the use of recycled fine aggregate [9].The utilization of recycled fine aggregate is restricted due to its lower quality compared to river sand, resulting in decreased workability and mechanical …

To examine the impact of sea water sea sand concrete with supplementary cementitious material on strength and microstructure properties. Objectives 1. To examine early and …

 — In the year of 2016, the amount of cement produced in the world reached 4.20 billion tonnes [1], and the estimated concrete production was around 25 billion tonnes.The production of aggregates (including both coarse and fine aggregates) reached about 40 billion tonnes in the year of 2014 [2].In particular, the consumption of concrete …

 — The chloride ion introduced into seawater or sea sand makes the chloride ion concentration threshold reach the height required for the destruction of the steel passivation film earlier. Compared with ordinary concrete, seawater and sea sand can induce and …

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.

 — According to the findings, concrete with a better substitution of fine aggregate utilizing sea sand and micro silica raises the strength of the concrete by 25%. Micro …

 — Pit sand–cement, and sea sand-cement mortar prisms were separately prepared using cement-sand mix ratio 1:3, and RHA composition of 0–44.44%. The optimum strength of the pit sand-cement mortar prisms after 1, 2, 7, and 28 days was recorded at 11.11% RHA by the mass of the cement. However, the compressive …

 — In this study, the effect of seawater and sea-sand on the properties of concrete made with two different kinds of cement were analyzed. Therefore, four kinds of concrete and four kinds of cement paste specimens were designed as shown in Table 2.The concrete specimens were prepared for compressive strength test, and the cement …

Designing concrete for exposure to seawater. Low permeability is critical. BY BRUCE A. SUPRENANT. Seawater causes both chemical and physical deterioration processes to …

Sorptivity and mechanical properties of fiber-reinforced concrete made with seawater and dredged sea-sand D Vafaei, R Hassanli, X Ma, J Duan, Y Zhuge Construction and Building Materials 270, 121436, 2021

 — An experimental study is presented in this article to demonstrate the concept and feasibility of ultra-high-performance seawater sea-sand concrete: ultra-high-performance seawater sea-sand concrete samples with a 28-day cube compressive strength of over 180 MPa were successfully produced; the samples were made of …

 — 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 …

 — The mixing procedure was initiated by dry mixing of cement, metakaolin, sea sand, fly ash, and fine silica sand using a standard mortar mixer for 2 min (140 rpm). Afterward, the water and water reducer were added to the dry components (stirred at 285 rpm for 5 min), and the PVA fibers were slowly mixed while stirring at 285 rpm for 5 min. ...

Xiao J, Qiang C, Nanni A, Zhang K (2017) Use of sea-sand and seawater in concrete construction: Current status and future opportunities. Constr Build Mater 155:1101–1111 42. Yamazaki K (1974) Viewpoints on using sea sand in concrete as fine aggregates in Japan. Concr J 12(10):72–76 Effects of Seawater and Sea-Sand on Concrete Properties …

 — 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 …

Types of Admixtures and Additives for Concrete. ... sometimes these are dictated by the types of materials used e.g. the colour and shade of sand, aggregate etc but it can also be coloured using special dyes. Available in a whole range of different tones and colours including black, brown, yellow and many more, the required quantity of dye is ...

 — The seawater sea-sand concrete utilized in this study has a design strength of C50, and its mix is presented in Table 2. The seawater utilized is artificial seawater, which was prepared by adding sea salt to freshwater in a ratio of 1:0.035. The seawater sea-sand concrete for standard cube specimens is the same batch as the concrete used …

Dr. Tran Tuan Hiep (Vietnam) Researching on using sea sand to produce cement concrete for road pavement construction The strength of cement concrete using sea sand is less than traditional cement concrete using …

 — Seawater and sea sand concrete (SWSSC) refers to concrete prepared by replacing river sand and freshwater with sea sand and seawater. Sea sand has the advantages of low mud content, good grading, and excellent working performance, making it an ideal building material [6].As one of the earliest countries in the world to use sea …

This paper describes the development of "concrete made with sea water and unwashed sea sand". A combination of sea water, unwashed sea sand, normal portland cement (OPC), …

The final, critical, step for concrete is to apply a primer. 3M's installation instructions say to paint on the primer over a clean concrete surface. It can be used over sealed or painted surfaces. "Since concrete isn't smooth, the primer smoothes the surface and creates double the adhesion," said Dan with Martinson-Nicholls, a 3M distributor ...