The sea sand and coral used in this study were obtained from the South China Sea. Coral aggregates are massive and similar in shape to ordinary aggregates (Fig. 1) and do not significantly affect the fluidity of concrete.The particle gradation of sea sand and coral aggregates is shown in Fig. 2. Table 1 compares the main reason for the lower …
The fracture toughness of sand concrete is affected by aggregate characteristics. In order to study the possibility of exploiting tailings sand, available in large quantities in sand concrete, and find an approach to improve the toughness of sand concrete by selecting appropriate fine aggregate. Three distinct fine aggregates have …
Abstract The characteristics of self-compacting concrete at high performance (SCCHP) made with different types of sand were investigated. Three types of sands were used separately and in binary combinations: river sand (RS), dune sand (DS) and crushed sand (CS). The introduction of CS and DS aims to valorize the by-products of crushing …
DOI: 10.1016/J.CONBUILDMAT.2014.07.070 Corpus ID: 135823788; Effects of foundry sand as a fine aggregate in concrete production @article{Prabhu2014EffectsOF, title={Effects of foundry sand as a fine aggregate in concrete production}, author={Ganapathy Ganesh Prabhu and Jung-hwan Hyun and …
1. INTRODUCTION . portant component in every construction project. Because it normally comes in a mixture form, before used in constructions it required to be removed from …
The shear displacement mainly occurs in the sand area within 5 cm above the concrete-sand interface, and the sand close to the concrete-sand interface has a large displacement. The maximum thickness of the intense shear zone is observed to be 6.25 times the median particle diameters, which is consistent with the findings of Wang …
A filter cake is often formed between soil and concrete during casting concrete in the ground, such as constructions of diaphragm walls and bored piles. The …
According to the literature review, the maximum substitute rate of sand replacement in concrete may assist to handle a number of disposal-related issues, …
Nevertheless, the overall mechanical properties of seawater sea-sand concrete are still comparable to those of freshwater river-sand concrete. The effect of seawater and sea sand on the mechanical and microstructural properties of concrete was investigated by Pan et al. [13]. It was found that the use of seawater and sea sand led to …
As natural sand deposits become depleted near some areas of metropolitan growth and viable sand sources non-susceptible to alkali–silica reactivity are consumed, …
Concrete production is characterized by a significant demand for energy and raw materials. The construction, maintenance, and demolition of engineering works cause excessive polluting waste that ...
Due to the large demands of infrastructure around the world, such as high-speed railways, highway bridges, and skyscrapers, pile foundations have become one of the most widely used geotechnical …
This paper presents the results of a laboratory investigation into the effect of support fluids on the interface shear strength between sand and cast in situ concrete. A …
2.1. Regulatory Framework for the Investigations. The production of concrete, the design and construction of concrete parts, the determination of properties and application rules in construction are regulated in the standard TCVN 7570:2006 "Aggregates for concrete and mortar—Specifications" [].The main requirements for …
The experimental research investigates the effect of different sizes crushed cockle shell (600µm and 2.36mm) as partial sand replacement on the workability and compressive strength of lightweight ...
The rationale of the design of mixes were based on a number of objectives: To investigate the effects of (1) SP dosage; (2) IS replacement ratio of fine aggregate; (3) FA or SF replacement of partial cement on the flowability, passing ability, WPD, unit weight, segregation width and compressive strength of heavy-weight concrete.
3.1.1. Coarse sand fractions (0.125/2, 2/5 and 5/8 mm) used for the experimental series A of the study. 0.125–8 mm partly natural sand fractions from Årdal (NSBR) sandpit. Årdal 0/8 mm sand (known also as NSBR-sand) is a reference aggregate in most Norwegian concrete laboratories due to its known good performance in fresh …
DOI: 10.13168/cs.2022.0050 Corpus ID: 253546176; EFFECTS OF DESERT SAND SUBSTITUTION ON CONCRETE PROPERTIES USING DESERT SAND-DOPED QUARTZ SAND AS THE FINE AGGREGATE @article{Liao2022EFFECTSOD, title={EFFECTS OF DESERT SAND SUBSTITUTION ON CONCRETE PROPERTIES …
Fig. 1 highlights the increase in research interest on the topic of seawater-mixed concrete and concrete exposed to seawater, in the last few decades. The result of an article search across research databases with the string 'concrete and seawater', includes articles related to concretes exposed to seawater, concretes cured with …
In addition, temperature, water content and surface roughness affect the soil–concrete interface shear strength. 16 Vasilescu 10 presented that the interface friction angle of Fontainebleau sand–concrete under monotonic temperature is 25.9°, 26.8°, and 25.4° for 8 °C, 13 °C, and 18 °C, respectively, while after 8-18 °C cyclic thermal ...
2.2 Specimen standards. Standard concrete cubes of 150 × 150 × 150 mm 3 were used for measuring the compressive strength. Concrete cylinders for measuring the split tensile strength were 150 × 300 mm 2, and concrete beams at 600 × 100 × 100 mm 3 were employed for flexural strength determination. The pull-out test was carried out by …
The Effect of Aggregate Properties on Concrete Concrete is a mixture of cementious material, aggregate, and water. Aggregate is commonly considered inert filler, which accounts for 60 to 80 percent of the volume and 70 to 85 percent of the weight of concrete. ... (1993) Concrete Structure, Properties, and Materials, Prentice-Hall, Inc ...
1. Introduction. Due to the scarcity of coarse aggregates and the availability of large quantities of sand in many regions around the world, interest has grown in the development of sand concrete as an alternative to ordinary concrete in civil engineering [1].Sand concrete is a new type of concrete that has strength comparable to …
DOI: 10.1063/5.0123815 Corpus ID: 257321716; The effect of pit sand properties on the water permeability of concrete @article{Pasalli2023TheEO, title={The effect of pit sand properties on the water permeability of concrete}, author={Daud Andang Pasalli and Sri Tudjono and Ilham Nurhuda}, journal={THE 6TH INTERNATIONAL CONFERENCE ON …
This study investigated the effect of hybrid fibers and their synergic interactions on the mechanical properties of seawater sea-sand (SWSS) concrete. These properties include compressive strength, elastic modulus, splitting tensile strength, compressive stress-strain behavior, and ductility, as well as slump and air content.
1. Introduction. With the development of the marine economy, the construction of islands and reefs has rapidly increased. The increased demand for large quantities of construction materials such as river sand and gravel leads to additional economic costs and energy consumption for marine transport from the mainland …
Seawater sea-sand concrete (SWSSC) could achieve comparable workability, mechanical strength, and durability as ordinary concrete (freshwater river-sand concrete) [[1], [2], [3]]. However, chloride ions in the ocean are prone to attack the steel, posing safety risks to steel-reinforced concrete (RC) structures.
In the three-year-old filters, the most common mode of failure was cracking of the concrete body, leading to water and sand leaking out of the filters. The cracking was likely a function of poor quality control during production (Vanderzwaag et al. 2009). In the eight-year-old filters, the modes of failure were cracks in the body and ...
material such as sand, gravel, crushed stone, blast-furnace slag, and lightweight aggregates that usually occupies approxi-mately 60 to 75% of the volume of concrete. Aggregate properties significantly affect the workability of plastic concrete and also the durability, strength, thermal properties, and density of hardened concrete.
Research has shown that the use of sea-sand in concrete can enhance its early compressive strength when compared to ordinary concrete [15]. However, some studies have reported no significant effect of sea-sand on the compressive strength of concrete [16], and even a reduction in its 28-day compressive strength [2], [11], [17], …
Water and effluents. George Solt CEng, FIChemE, in Plant Engineer's Reference Book (Second Edition), 2002. 19.7.2 Sand filters (Depth Filters) Sand filters are widely used …
To achieve the unloading effect, the initial normal stress is set as 150 kPa, the sand is consolidated for more than 1 h utill the sand's vertical deformation stabilizes, the normal stress is discharged to the specified normal stress during shear stress, i.e., 120, 90 or 60 kPa at the rate of 0.5 kPa/s, and then the sand is consolidated for ...
More Filters. Filters ... The effect of this sand on the creep of concrete has not yet been fully studied. Understanding the creep … Expand [PDF] 1 Excerpt; Save. Effects of chloride ion in sea sand on properties of fresh and hardened concrete incorporating supplementary cementitious materials.
DOI: 10.1016/j.jobe.2023.108308 Corpus ID: 266326364; Effects of fiber properties on flexural and fracture characteristics of manufactured sand concrete based on acoustic emission
The effect of relative density on the mechanical properties of the soil–structure interface is yet to be studied systematically and comprehensively. Furthermore, few studies have reported the effects of concrete surface roughness and relative density on the mechanical properties of the sand–concrete interface.
The main objective of this research is to study the effect of the chemical composition and grain size of pit sand on the permeability of concrete.
8 Steps To Sand Concrete Floors, Patios, Walls, or Countertops. Sanding concrete walls, floors, patios, or countertops is an easy and affordable way to transform the look of any space without the need for costly renovations. Here's your step-by-step guide on how to sand concrete in 8 simple steps! Step 1. Prepare the Area and Yourself
3 Effect of Mixing Water Quality on Concrete Properties High demand for and continuous mismanagement of water resources has exacerbated widespread hazards of water stress.