2011-5-26 · The river sand, which is a non-pozzolanic material, was ground into 3 different particle sizes. Portland cement type I was replaced by the ground river sands at 10wt%–40wt% of binder to cast mortar. Compressive strengths of mortar were investigated and the filler effect of different fine particles of sand on the compressive strength of mortar was evaluated. The
Read More2014-8-1 · purities present in building sand and its effect on compressive strength of concrete. This paper presents the findings on the quality of building sand as sourced from eight supply points in Nairo-bi County and its environs and the effects of these sand impurities to the compressive strength of
Read MoreFailure of concrete structures leading to collapse of buildings has initiated various researches on the quality of construction materials. Collapse of buildings resulting to injuries, loss of lives and investments has been largely attributed to use of poor quality concrete ingredients. Information on the effect of silt and clay content and organic impurities present in building sand being ...
Read More2019-10-29 · content also has adverse effect of the strength of concrete due to poor adhesion. Researchers have therefore develop various models for predicting the effect of sand fines and W/C on the strength of concrete. However, there is a gap in literature for the combined effect of sand fines and water/cement ratio’s effect on the properties of concrete.
Read MoreIn the development of Pakistan construction industry, the utilization of River Indus sand in concrete as fine aggregate has expanded tremendously. The aim of this research is to study the effect of Indus River sand on the tensile strength of various grades of concrete when it is utilized as fine aggregate. Concrete Samples of M15, M20 and M25 grade concrete were cured for 7,
Read MoreSubsequently, the effect on the characteristics of recycled concretes made with a water/cement ratio of 0.50, when part of the recycled aggregate was replaced with recycled sand, was studied. The results obtained on mortars indicate that the use of up to 20% recycled sand caused a drop in the compressive and flexural strength.
Read More2010-7-12 · Concrete materials such as cement, sand, aggregates, and other admixtures play an important role in maintaining the air-void system in concrete. It has been found that air content will increase as cement alkali levels increase (Pomeroy 1989; Whiting 1983) and decrease as cement fineness increases significantly (ACI Comm. 212 1963).
Read More2017-11-20 · The Effects of Loamy Soils. Loam is a type of soil formed from several other materials, including: Clay. Silt. Sand. The combination of these materials provides important advantages when it comes to constructing
Read More2019-2-8 · The effect of shape, texture and grading of aggregates on fresh concrete was evaluated experimentally, quantified by means a proportioning method based on packing density concepts, the Compressible Packing Model (CPM), and
Read MoreEffect of the storage conditions of cement on the processing and hardening properties of concrete. ... Nevertheless, the effects also occur for ordinary concrete and should not be ignored.
Read More2011-5-26 · The river sand, which is a non-pozzolanic material, was ground into 3 different particle sizes. Portland cement type I was replaced by the ground river sands at 10wt%–40wt% of binder to cast mortar. Compressive strengths of mortar were investigated and the filler effect of different fine particles of sand on the compressive strength of mortar was evaluated. The
Read More2014-8-1 · purities present in building sand and its effect on compressive strength of concrete. This paper presents the findings on the quality of building sand as sourced from eight supply points in Nairo-bi County and its environs and the effects of these sand impurities to the compressive strength of
Read MoreIn order to study the recycling of discarded liquid crystal display (LCD) glass into concrete (LCDGC), a portion of the usual river sand was replaced by sand prepared from discarded LCD glass. Three different mix designs were regulated by the ACI method (fc(28)=21, 28, and 35MPa) with 0%, 20%, 40%,
Read MoreSubsequently, the effect on the characteristics of recycled concretes made with a water/cement ratio of 0.50, when part of the recycled aggregate was replaced with recycled sand, was studied. The results obtained on mortars indicate that the use of up to 20% recycled sand caused a drop in the compressive and flexural strength.
Read More2016-5-19 · sand was deemed suitable for use in concrete for construction applications. The addition of 0.1% by concrete volume of Forta Ferro, polpropylene and ReoShore 45 fibres had an insignificant effect on the mechanical properties of concrete with 10%
Read More2009-2-1 · Three types of sand used in foundries were considered: the white fine sand without the addition of clay and coal, the foundry sand before casting (blended), and the foundry sand after casting (spent). The standard sand (Class M) was partially replaced by (0%, 25%, 50%, 75%, and 100%) these types of sand. Thirteen concrete mixtures were employed ...
Read More2020-6-16 · The use of seawater and sea sand did not seem to have significant effects on the compressive strength, ultimate axial strain and stress–strain responses of confined concrete, and the ultimate strain capacity of carbon fibre-reinforced polymer jackets neither.
Read MoreThis paper assesses the effect of clayey impurities in the sand available in Akure metropolis of Ondo State, Nigeria. Ten samples of sand were collected from ten different locations in the city. The field settling method was used to determine the percentage content of clay in each sand samples. From each san sample, 15 concrete cubes were casted.
Read Moretaining shrinking aggregates, but made with a sound quartz sand aggregate, was examined. From this it was seen that while both sets of mortar specimens showed the expected shrinkage on drying and expansion on wetting, this effect was about five times greater in the specimens containing the shrinking sand than in those containing the quartz sand .
Read More2017-2-2 · natural sand i.e (quarry dust replaces 60% of natural sand) in concrete. Silica fume is added as mineral admixture by 15% of weight of cement and steel fiber used in different percentage (0.5%, 1.0%, and 1.5%) to increase the tensile strength. Tests were conducted for3, 7 and 28days to study
Read More2014-8-1 · purities present in building sand and its effect on compressive strength of concrete. This paper presents the findings on the quality of building sand as sourced from eight supply points in Nairo-bi County and its environs and the effects of these sand impurities to the compressive strength of
Read MoreIn order to study the recycling of discarded liquid crystal display (LCD) glass into concrete (LCDGC), a portion of the usual river sand was replaced by sand prepared from discarded LCD glass. Three different mix designs were regulated by the ACI method (fc(28)=21, 28, and 35MPa) with 0%, 20%, 40%,
Read More2022-1-3 · There is faster increase in strength towards coarser side of sand. Effect of Fineness of Sand on Flexural Strength of Concrete Flexural strength is calculated from 28 days testing of beam of size 150x150x700 mm by using
Read More2021-6-14 · Typical effects of coarse and fine aggregates on the long-term properties of sea sand recycled aggregate concrete (SSRAC) are analyzed by a series of axial compression tests. Two different types of fine (coarse) aggregates are considered: sea sand and river sand (natural and recycled coarse aggregates). Variations in SSRAC properties at different ages are
Read More2018-8-22 · Abstract: In this paper, we evaluated the effect of sand content on the properties of the drilling fluid and filter cake during drilling a long horizontal section in sandstone reservoirs. Sixteen drilling fluid samples were collected and the initial properties were measured such as density and rheological parameters.
Read MoreSubsequently, the effect on the characteristics of recycled concretes made with a water/cement ratio of 0.50, when part of the recycled aggregate was replaced with recycled sand, was studied. The results obtained on mortars indicate that the use of up to 20% recycled sand caused a drop in the compressive and flexural strength.
Read More2005-1-1 · Effects of these aggregate properties on mortar and concrete rheology were studied using a Brookfield and portable IBB rheometer, respectively. Using the artificial neural network as a tool to analyze the test data, the relative degree of importance of the factors that influence mortar and concrete rheological behavior were evaluated, and the ...
Read More2017-11-20 · The Effects of Loamy Soils. Loam is a type of soil formed from several other materials, including: Clay. Silt. Sand. The combination of these materials provides important advantages when it comes to constructing
Read More2019-2-8 · The effect of shape, texture and grading of aggregates on fresh concrete was evaluated experimentally, quantified by means a proportioning method based on packing density concepts, the Compressible Packing Model (CPM), and
Read More2014-4-14 · Concrete can deteriorate for a variety of reasons, and concrete damage is often the result of a combination of factors. The following summary discusses potential causes of concrete deterioration and the factors that influence them. CORROSION OF EMBEDDED METALS Fig. 1. Corrosion of reinforcing steel is the most common cause of concrete ...
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