impact of granite and gravel as coarse aggregate on concrete
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This study focusses on the influence of granite-gravel (washed and unwashed) combination as coarse aggregate on hardened properties of Self-Compacting Concrete (SCC). Granite-gravel combination in varying percentages was used as coarse aggregates to produce SCC while other concrete constituents were kept constant.

Coarse aggregate: Coarse aggregates generally consist of types of gravel. A cement mix using coarse aggregate may use a majority of coarse aggregate with a fine aggregate like crushed stone filling up the remainder. Coarse aggregate is any material whose particles are anywhere from 3/8 inches and 1.5 inches in width.

Impact of coarse aggregate type and angularity on permanent deformation of asphalt concrete ... asphaltic concrete mixture is comprised of 90% aggregate. The other 10% are the ... basalt, dolomite, gravel, granite and traprock have been used for production of asphalt concrete. The high stability has been achieved in using

Though the specific gravity of the fly-ash aggregate(1.86,1.9) less than gravel(2.72) and the impact value of the gravel(20.72) is lesser than the fly- ash aggregate(31.32,29.64) The compressive of the Class F fly ash pellets concrete has surpassed the minimum strength that a M25 concrete have i.e. 25 Mpa

Normal concrete can be produced from different aggregate and it impart different properties to the resulting concrete. The most important property of a concrete is its compressive strength. For the purpose of this work, the two type of coarse aggregate are, local gravel and granite. The fine aggregate is normal sand bought from a local distributor.

granite waste for coarse aggregate are done by using concrete testing. ingredients of The concrete is added and the test is conducted. In this experiment we replace the granite waste for coarse aggregate partially in the percentage of 10%, 20%, 30%, 40%, 50%. The replaced concrete is compared with the normal concrete. For this cube samples of size

Coarse aggregates were partially replaced with crushed granite at the incremental rate of 20% by weight of total coarse aggregate from 0% to . Mix proportion of 1:2:4 and the water-cement ratio of 0.65 were used. The concrete design targeted compressive strength of …

produced. The quantities of cement, sand, water and the coarse aggregate were kept constant for all the mix samples, the only variant is the gradation of the coarse gravel-aggregate. The details of the concrete mix proportion are shown in Table 1 below.

1.Size of Coarse Aggregates: The size of the coarse aggregate depends on the use of the concrete is to be poured. For large-scale concreting operations without complex reinforcement, large aggregates of size 80 mm, 40 mm, 20 mm are used. For the simple construction of residential or other buildings, 20 mm is the maximum size will be used.

Jimoh and Awe (2007) conducted a test on two samples mix of quarry dust with granite of 20mm maximum, gravel of 28mm aggregate sizes and sand, they concluded that the use of …

aggregate, Coarse aggregate & Granite fines. 1. INTRODUCTION Concrete is the most popular building material in the world. Construction Industry contributes huge amounts to Indian economy and concrete is one of the best materials used in construction. The ingredients used in it include Cement, Sand, Gravel and Water. Now-a-days sand is not

Well-prepared granite waste can be used as coarse aggregate. • The morphological parameters of the aggregates were determined. • The impact of aggregate morphology on concrete properties was analyzed. • Economic analysis of the disposal of granite waste was carried out. • The type of the aggregate had an influence on the properties of ...

The paper examined the impact of coarse aggregates on compressive strength of concrete. Over one-third of the volume of concrete is occupied by coarse aggregate and any changes in coarse aggregate type can affect its strength and fracture properties. The paper examined the impact of coarse aggregates on compressive strength of concrete.

Variation in the size of Aggregates changes the water demand, cement content, micro-cracking (strength) in concrete. It also effects pumpability, and durability of concrete. Grading of aggregates depends on the proportions of coarse and fine aggregate. If grading of aggregate is varied, it also changes cement paste content (cost economy), workability of the mix,

2.2 Materials The cement used to prepare concrete tested in the study was Portland cement CEM I 42,5R, the applied aggregate was river sand and two fractions of gravel: 2/8 mm and 2/16 mm.

Aggregate can be classified as fine or coarse aggregate. Fine aggregate is generally natural sand and is graded from particles 5mm in size down to the finest particles but excluding dust. Coarse aggregate is natural gravel or crushed stone usually larger than 5 mm and usually less than 16 mm in ordinary structure [1, 7, 9, 28, 29].

3.1 Coconut Shell. 3.2 E-waste For Partial Replacement. 3.3 Construction Waste Material. 3.4 Plastic Waste For Partial Replacement. 3.5 Quarry dust For Partial Replacement. 3.6 Glass Particles. 4 Tests To Be Conducted To Find Successful Coarse Aggregate Replacement. 5 Advantages & Disadvantages of the Replacement. 5.1 Advantages.

Concrete has a far greater strength than mortar and sandcrete of the same cement: aggregate ratio. This exceeding strength is, most times, found to be triple (or more) that of mortar. Coarse aggregates, which are the interest of this study, make the difference. Three different types of coarse aggregates, with 20mm maximum size, were employed in the investigation, namely; …

Normal concrete can be produced from different aggregate and it impart different properties to the resulting concrete. The most important property of a concrete is its compressive strength. For the purpose of this work, the two type of coarse aggregate are, local gravel and granite. The fine aggregate is normal sand bought from a local distributor.

weights (kg) of materials as follows: Dangote cement –15kg, fine aggregate -30kg, coarse aggregates – 45kg and pipe-borne water -10.5kg. Twenty-four (24) cubes, twelve (12) from each type of coarse aggregate (crushed granite and quartzite) were moul ded, cured and tested to determine the compressive strengths of the various cubes.

Although aggregates are most commonly known to be inert filler in concrete, the different properties of aggregate have a large impact on the strength, durability, workability, and economy of concrete. These different properties of aggregate allow designers and contractors the most flexibility to meet their design and construction requirements.

In the present study, the generated waste was used in lean cement concrete as a replacement of conventional coarse aggregate in different percentages 20– by weight. The idea of working on lean concrete mixes was maximum utilization of marble waste which saves the natural resources. 2.

Hydraulic cement concrete is a cement and water paste in which aggregate particles are embedded. Aggregate is granular 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 ...

Synopsis Effects of using recycled concrete of different qualities as coarse aggregate upon the strength and deformation of concrete are reported. Tests on the aggregates showed that the recycled concrete aggregates have lower specific gravity and higher absorption capacity than the original crushed granite aggregate. The resistance to mechanical actions such as impact, …

The aim of this study was to determine the impact of mechanical properties of aggregates on ordinary and high performance concretes with these aggregates. Research included aggregate crushing resistance and mechanical properties of 24 concretes with: basalts, granites, granodiorite, dolomite, quartzite, gravels from 13 Polish and Ukrainian mines.

coarse aggregate contents with aggregate volume factors (ACI 211.1-91) of0.75 and 0.67. Water-to-cementitious material ratios range from 0.24 to 0.50. ... There is much controversy concerning the effects of coarse aggregate size on concrete, principally about the effects on fracture energy. Some research (Strange and Bryant 1979, Nallathambi ...

Washed gravel obtained from the aggregate market located at Wurukum area of Makurdi town was used. The maximum size of the gravel used as coarse aggregate was 37.50mm, with a unit weight of 1540kg/m 3 and a specific gravity of 2.65. Particle size distribution of the coarse aggregate used, CGF and Makurdi river sand is as presented in Figure 1.

1. Introduction. Coarse aggregate, i.e. gravel or crushed rock, is a major constituent of concrete. At the meso-scale, concrete is essentially a composite comprising three phases – mortar matrix, randomly distributed coarse aggregate particles, and interfacial transition zones (ITZ) at the interface between the mortar matrix and coarse aggregate particles.

inert granular materials such as gravel, crushed stone and sand. Coarse aggregate is one of the essential ingredients apart of water and cement in concrete production. It consists about 60 to 75 percent of total concrete production. Coarse aggregate comes from particles greater than 4.75 mm but commonly in a range between 9.5 mm to 37.5 mm.