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Concrete admixtures have various functions and they are as follows: (a) To increase the rate of strength development at early ages – calcium chloride is the most widely used accelerator, (b) To retard the initial setting time while pumping concrete over a long distance,
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Farrell Equipment & Supply is your source for concrete equipment and tools. We have all the …
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Deewan Equipment Trading has positioned itself over the years as a leading one-stop-shop for concrete and asphalt equipment in the Middle East and GCC region. Our commitment to achieving client goals, long experience and the high-end product range we offer, allows us to be your trusted partner in concrete and asphalt business.
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The compressive strength of the concrete cylinder is one of the most common performance measures performed by the engineers in the structural design. The compressive strength of the concrete cylinder is one of the most common performance measures performed by the engineers in the structural design. Here, the compressive strength of concrete cylinders is determined …
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🕑 Reading time: 1 minute Shear design of reinforced concrete (RC) beam involves the determination of spacing between stirrups. Shear is a word used for forces that work perpendicular to the longitudinal axis of RC beam. Commonly, shear forces are maximum at supports of beams and decrease towards the middle of the beam span. RC […]
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🕑 Reading time: 1 minuteFlowable fill concrete is a self-compacting cementitious slurry consisting of a mixture of fine aggregate or filler, water, and cementitious material which is used as a fill or backfill in lieu of compacted-soil backfill. This mixture is capable of filling all voids in irregular excavations and hard to reach places (such […]
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🕑 Reading time: 1 minute Lift-Slab Construction is a precast method of construction of slab on the ground and then lifting it to the structure. A type of precasting used in building construction involves casting floor and roof slabs at or near ground level and lifting them to their final position, hence the name lift-slab construction.
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Grade of concrete is denoted by prefixing M to the desired strength in MPa. For example, for a grade of concrete with 20 MPa strength, it will be denoted by M20, where M stands for Mix. These grade of concrete is converted into various mix proportions. For example, for M20 concrete, mix proportion will be 1:1.5:3 for cement:sand:coarse aggregates.
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🕑 Reading time: 1 minute Reinforced concrete is a combination of traditional cement concrete with reinforcements (steel bar). This combination is made to use the compressive strength of concrete and tensile strength of steel at the same time, hence, work together to resist many types of loading. The term reinforced is used because the steel reinforces […]
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🕑 Reading time: 1 minutePrecast concrete construction system has its own characteristics which influence the layout, span length, construction depth, and stability system to a great extent. In precast concrete construction, majority of structural members are manufactured in manufacturing plants away from the construction site. After that, they are delivered to the project site to […]
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Popular equipment includes the Vicat apparatus, Grout flow cones, Blaine air permeability, ASTM test sand, Cube Molds, and Prism Molds. Concrete Curing equipment ensures maximum strength development under the optimum …
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🕑 Reading time: 1 minuteHeavy construction equipment are used for various purposes in large projects. Selection of different types of heavy equipment depends on the size of the work and economy of the project. These make construction process easier and faster. Contents:Types of Heavy Construction Equipment1. Excavators2. Backhoe3. Dragline Excavator4. Bulldozers5. …
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Ordinary Portland cement is the most widely used type of cement, which is suitable for all general concrete construction. It is the most commonly produced and used type of cement around the world, with annual global production of around 3.8 million cubic meters per year. This cement is suitable for all kinds of concrete construction. 2.
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🕑 Reading time: 1 minute Concrete block masonry which is also known as concrete masonry unit (CMU) have advantages over brick and stone masonry. Concrete blocks are manufactured in required shape and sizes and these may be solid or hollow blocks. The common size of concrete blocks is 39cm x 19cm x (30cm or 20 cm or 10cm) or 2 inch, 4 inch, 6 inch, 8 inch, 10 inch and …
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concrete is a type of lightweight concrete that is manufactured from cement, sand or fly ash, water, and the . concrete is in the form of ed grout or ed mortar. concrete can be defined as a cementitious material that consists of minimum 20 percent of , that is mechanically entrained into the plastic mortar.
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According to ACI Code 7.7, concrete cover of 40 mm for cast in place beams, not exposed directly to the ground or weather. At least 50mm cover, if the concrete surface is to be exposed to the weather or in contact. To simplify construction and thereby to reduce costs, the overall dimensions of beams, b and h are almost rounded up to nearest 25 mm.
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🕑 Reading time: 1 minute Honeycomb is a rough and stony concrete appearance with air spaces between aggregates. It may occur due to improper concrete workability and concrete pouring practice, excessive water in the concrete mix, inadequate formwork rigidity and waterproofing, etc. It is found mostly in beam-column junctions, corners, inaccessible areas where proper …
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Buy and sell unused and used Concrete Equipment at IronPlanet. Whether looking for a …
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The use of supersulphated cement in concrete decrease the compressive strength by 50% compared to that of OPC. Type of Surface and Moisture Condition The rebound hammer test work best for close texture concrete compared with open texture concrete. Concrete with high honeycombs and no-fines concrete is not suitable to be tested by rebound hammer.
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However, if on-site machine mix concrete is employed then ratio of concrete constituents shall be found. Poured concrete shall be compacted adequately using vibration equipment or any other suitable means, then finish the top of grade beam. Finally, the side-shutter of grade beam can be removed 24 hours after pouring concrete.
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