However, it is rare to find a publication on coarse aggregate type used in production and its effect on the properties of vibropressed concrete pavement units. The aim of this work was to analyse the influence of coarse aggregate type on physical mechanical properties of vibropressed concrete .
Concrete is most widely used building material in the world, as well as the largest user of natural resources with annual consumption of billion tons. Basically it consists of aggregates which are bonded together by cement and water. The major part of concrete besides the cement is the aggregate. Aggregate include sand and crushed stone / Gravel.
coarse aggregate, it satisfies the strength criteria required for an M30 mix.  M L Berndt studied the properties of sustainable concrete containing fly ash, slag and recycled concrete aggregates by replacing cement by a percentage of fly ash or slag and natural aggregates by recycled concrete aggregates.
Abstract: The main purpose of this study is to investigate the effect of using three types of coarse aggregates (gravel, basalt and dolomite) and three different percentages of water and cement on the properties of selfcompacting concrete. To this end, nine mixes containing different percentages of water and cement were designed.
Provide coarse aggregates for portland cement concrete in accordance with Table 9021, Table 9022, and this subsection. A. Slag Coarse Aggregate. Use slag coarse aggregate consisting of iron blast furnace slag or reverberatory furnace slag with a dry (loose measure) unit weight of at least 70 pounds per cubic foot in accordance with MTM 123. 740
The replacement of 100 % slag aggregate (coarse) increased concrete density by about 5 to 7 % compared to control mix. The study concluded that compressive strength of concrete improved by 4 to7 % at all the % replacements of normal crushed coarse aggregate with crystallized slag.
and bond properties of coconut shell concrete. The properties of concrete using coconut shell as coarse aggregate were studied. Compressive, flexural, splitting tensile strengths, impact resistance and bond strength were measured and compared with the theoretical values as recommended by the standards. Two different water
Most recycled concrete aggregates readily pass the requirements for coarse aggregates in structural concrete (ASTM 2009a); however, the use of recycled concrete as aggregate in construction has been largely limited to nonstructural applications such as .
Some properties of concrete containing sintered domestic refuse as a coarse aggregate, Magazine of Concrete Research, 1983, 35(123), p. 7585. 2. Okafor, Palm Kernel Shell as a Lightweight Aggregate for Concrete, Cement and Concrete Research, 1988, 18(6), p. 901910.
Construction aggregate includes a range of particulate materials ranging from coarse to medium grains including sand, gravel, slag, crushed stones, and recycled concrete. These materials are mixed in with concrete to give the end product a strong and durable finish.
coarse aggregate and the results of the tests showed that the compressive strength of the concrete decreased as the percentage of the shells increased , . The properties of concrete using coconut shell as coarse aggregate were investigated in an experimental study and the study concluded lightweight concrete .
SCC depend on the form and surface properties of the coarse aggregate particles. Gravel is commonly used as coarse aggregate in highly flowable concrete since the .
The coarse aggregate in concrete was replaced with 0%, 20%, 40%, 60%, 80% and recycled coarse aggregates. The test results indicated that the replacement of natural coarse aggregates by recycled aggregates up to 40% had little effect on the compressive strength, but higher levels of replacement reduced the compressive strength.
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Nowadays use of concrete is increased day by day which increases the demands of aggregates. To meet these needs of the construction industries, concrete experts carry out research on concrete and developed the new artificial aggregates. These new aggregates .
By common coarse aggregate concrete with different degrees of heat insulation treatment, the determination of its physical and mechanical properties observed mass loss, color changes, and changes in surface morphology crushing indicators, study its performance in hightemperature study of concrete prepare. Second, thetest equipment