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Showing 1 to 20 of 39 for “"Fine aggregate"”.
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Fine aggregate resources in the greater Cape Town area
Fine aggregate resources in the Greater Cape Town area have historically been in abundant supply. This supply has been typically comprised of the extensive natural building sand deposits that are scattered throughout the region. However, over the past decade increasing concerns have been raised …
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The properties of concrete containing coconut shell as fine aggregate
… Therefore, this study aims to examine the use of fine coconut shell (FCS) as a partial replacement of sand and its low thermal conductivity applications. The first part of the research focused on the characterisation properties of fine coconut shell and sand through sieve analysis, laser …
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Platinum Slag as Fine Aggregate in Concrete for Coastal Applications
… and steel slags, have been studied as fine aggregate replacements, platinum slag remains under-investigated. This study assesses platinum slag as a fine aggregate in concrete for coastal service conditions by evaluating fresh and hardened properties, durability under marine-relevant …
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Use of grape pomace as a fine aggregate in concrete
… been conducted into the replacement of cement or aggregates with alternative materials. These alternatives range from recycled glass, plastic, rubber, hemp, and sawdust, to other organic materials. Minimal research has been conducted into the use of pomace in concrete. Grape pomace is a waste …
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Palm oil shell aggregate as cool pavement by replacing fine aggregate
… to be less heat absorbent. Palm Oil Shell Aggregate (POSA) is the material that is identified as having a potential to be the cool pavement due to the presence of Near Infrared Region (NIR) reflective component and void after POSA is replaced in asphalt pavement. Therefore, the study is …
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The viability of using gold mine tailings as a substitute for fine aggregate in concrete mixes
… the Witwatersrand region as a substitute for fine aggregates in concrete. Laboratory experiments were used to determine the physical properties, such as density and particle size distribution (PSD) and compare these physical properties with the other conventional fine aggregates used in this …
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Strength and water permeability of concrete containing coal bottom ash as cement and fine aggregate replacement material
… coal bottom ash (UGCBA) as a cement and fine aggregate replacement material in concrete and evaluate its strength and durability performance. In this study, GCBA was grinded for 20, 30 and 40 hours to produce fine particles as comparable to cement. Initially, particle size distribution …
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Structural behaviour of circular concrete filled steel tube column fill with selfcompacting concrete incorporating coal bottom ash as fine aggregate replacement
… for compaction. However, higher volume of fine aggregate required in SCC makes SCC less preferable. The objective of this research was to investigate the behaviour of circular CFST column filled with SCC incorporating coal bottom ash (CBA) as fine aggregate replacement. In this research …
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Characterisation of shape of fine recycled crushed coloured glass and the effect on the properties of structural concrete when used as a fine aggregate replacement
… concrete as a replacement for cement and/ or aggregate. In the research programme concrete mixes were tested which had 0%, 25%, 50% and 100% of the fine aggregate replaced by crushed waste glass. All glass was originally in bottle form and was crushed to produce ‘sand’ which had a grading …
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Evaluation of the compacted aggregate resistance test
The Compacted Aggregate Resistance (CAR) test is a procedure used to analyze the quality of asphalt. It is a punch shear test that indirectly measures the shape and angularity of fine aggregates. The CAR test is in the developing process of replacing the current Superpave standard for fine …
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An investigation of the effects of abnormal curing conditions on Dolomitic limestone Portland cement concrete
… concrete using Dolomitic limestone sand as the fine aggregate. The most important of these are as follows: 1. Fresh concrete continues to gain strength while in the frozen state. 2. Freezing and then thawing of fresh concrete does not have an appreciable effect on the twenty-eight day ultimate …
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Asphalt Mixture Design Concepts to Develop Aggregate Interlock
… it was desired to understand the interaction of aggregates, asphalt, and the voids created during their compaction. In asphalt mixture design, guidance is lacking in the selection of the design aggregate structure and understanding the interaction of that aggregate structure and mixture …
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Comparison and Analysis of the Strength, Stiffness, and Damping Characteristics of Concrete with Rubber, Latex, and Carbonate Additives
… concrete mixtures by replacing up to 20% of the fine aggregate to measure their effects on strength, stiffness, damping, and air content. The additives included rubber particles from recycled tires, calcium carbonate particles, styrene butadiene rubber (SBR) latex, and a commercially available …
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Alkali Silica Reaction Mitigation Using High Volume Class C Fly Ash
… concrete, which contains the moderately reactive aggregates found in the Arkansas River.</p> <p>The research used locally available fly ashes in order to represent the materials used in conjunction with the Arkansas River fine aggregates. The research includes three regional, Class C fly ashes. …
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Microstructure, Quasi-Static, And High-Strain Rate Dynamic Characterization Of Metakaolin And Fly Ash Based Geopolymers For Structural Applications
… material system that utilizes siliceous sand as fine aggregate. Microstructural characterization studies included Scanning Electron Microscope (SEM), Energy Dispersive Spectroscopy (EDS), X-Ray Diffraction (XRD), X-Ray Fluorescence (XRF), and Thermal Gravimetric Analysis (TGA). The mechanical …
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NEW GENERATION POLYMER CONCRETE INCORPORATING CARBON NANOTUBES
… PC is recognized in the industry as a mix of aggregate and polymer resin with no Portland cement. PC has been favoured over conventional Portland cement concrete when special characteristics such as low permeability, high adhesion, and/or high durability for service in aggressive (e.g. …
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The use of aggregate from demolition rubble in the making of ordinary and structural concretes
… the concept of recycling demolished concrete as aggregate which is then used in fresh concrete - to be known as "recycled concrete". Various aspects of concrete technology are covered and in this way recycled concrete is compared to conventional concrete. The work was performed in three phases, …
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Super Absorbent Polymers (SAPs) as physical air entrainment in cement mortars
… control. One additional mixture used lightweight fine aggregate as a mechanism for physical air entrainment. The quality of the air void system was investigated using a high resolution flatbed scanning and image analysis. One-dimensional water absorption decreased with increased SAP dosage …
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Performance of concrete made with commercially produced recycled coarse and fine aggregates in the Cape Peninsula
… concrete made with laboratory-crushed recycled aggregate have been extensively investigated and reported by various researchers. However, only limited data are available on commercially produced recycled aggregates (RA). In this study, the properties of RA and the performance of concrete made …
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Mechanical, thermal and acoustic properties of rubberised concrete incorporating nano silica
… were used RA (0.5 – 1.5 mm) and RB (1.5 – 3 mm). Fine aggregate was replaced with rubber at a ratio of 0%, 10%, 20% and 30% by volume, and NS is used as partial cement replacement by 0%, 1.5% and 3%. A constant water to cement ratio of 0.45 was used in all concrete mixes. Various properties of …
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