Concrete Cube Compressive Strength

Concrete is a tough and reliable material, and it can be used for a wide range of projects. Eventually though, a structure made from this versatile material will need to be replaced. At the very least, it may require repairs.

Proc., 7th Int. Conf. on Fracture Mechanics of Concrete and Concrete Structures. Korea Concrete Institute,

Aggregate is one of the basic constituents of concrete. Its quality is of considerable importance because about three-quarter of the volume of concrete is occupied by aggregates. One of the physical properties of aggregate that influence the property of concrete is the grading of aggregate. The grading of aggregate defines the proportions of particles of different size in the aggregate. The grading of fine (size < 5 mm) and coarse (size > 5 mm) aggregates are generally required to be within the limits specified in BS 882: 1992.

The definition of high strength changes over the years as concrete strength used in the field increases. Any construction activity requires several materials such as concrete, steel, brick, stone, glass, clay, mud, wood, and so on. However, the cement concrete remains the main construction material used in construction industries. For its suitability and adaptability with respect to the changing environment, the concrete must be such that it can conserve resources, protect the environment, economize and lead to proper utilization of energy. To achieve this, major emphasis must be laid on the use of wastes and byproducts in cement and concrete used for new constructions. The utilization of recycled aggregate

Ultra high performance concrete (UHPC) represents a major progress step over normal strength concrete (NSC) and high strength concrete (HSC), through the achievement of very high strength and very low permeability. Basically, the UHPC is a concrete with compressive strength ranging 120 to 400 MPa, this “ultra” high strength is achieved through different techniques including the use of improved materials, ultra-fine pozzolans (e.g. silica fume), low water-cement ratio, improved quality and higher dosage of superplasticizer, use of fibers (metallic or synthetic) to increase the energy absorption capacity and decrease brittleness, high cementitious materials content, longer mixing time and heat treatment [1]. UHPC tensile strength varies from 10 to 30 MPa; and the modulus of elasticity is in the range of 60 – 100 GPa [2].

Concrete is a important product that is used in the construction of building and infrastructures. A concrete has to have strength, durability and quality to make a strong and stable infrastructure. This study will tell us does ACC concrete mix is a very good product in the market. Does it pose a strong contender to its competitors in the current market and does the brand image of ACC ltd. plays any role in purchasing of its products.

The testing is done in a laboratory off-site. The only work done on-site is to make a concrete cylinder for the compression test. The strength is measured in Megapascals (MPa) and is commonly specified as a characteristic strength of concrete measured at 28 days after mixing. The compressive strength is a measure of the concrete’s ability to resist loads which tend to crush it.

Concrete is known as a construction material which is widely used throughout the entire world. According to the research, concrete contains Portland cement and it is an essential element to concrete (Naik and Moriconi, 2010). This essential element is capable of releasing carbon dioxide significantly. As carbon dioxide is known to be a green house gas, hence it can be said that this type of concrete is damaging the environment. In order to save the environment a new technology is made by which eco – friendly concrete can be made. Such concretes are made of the concrete wastes that are known to be eco – friendly; therefore, the concrete is also eco – friendly. This type of concrete is also known as green

For compressive strength test, cube specimens of dimensions 150 x 150 x 150 mm were cast for M60 grade of concrete. The moulds were filled with different proportions of cement,metakaolin and Fly Ash. Vibration was given to the moulds using the table vibrator. The top surface of specimen was leveled and finished. After 24 hours the specimens were demoulded and were being transferred to curing tank where in they were allowed to cure for 7,28and 56 days. After 7,28and 56 days curing, these cubes were tested on a digital compression testing machine as per I.S. 516-1959[14].

Nature of Request of Cement: Cement is utilized for Colossal groundwork undertakings, Business housing undertaking, Residential undertakings, precast or block making works, Prepared Blend Concrete constituents or for minor overhaul works

The behaviour of concrete under a load is an important phenomenon that has to be considered while evaluating and analysing concrete structures. Concrete is one of the most widely used construction materials in the world. So it is essential to understand what concrete is and the properties associated with it. For more than 200 years, this artificial conglomerate stone made up of cement, water and aggregates, has been accepted for its long-lasting and dependable nature. In addition to durability, its superior energy performance, flexibility in design and affordability are some of other important aspects of concrete. (Naik, 2008).

Nowadays, we talk much about high performance concrete. It has higher strength, better durability and elasticity. Although high strength concrete is often considered as relatively new material, its development has been gradually taking place over many years.

The properties of concrete are affected by the manner in which the pores of various sizes are distributed within it. The porosity of concrete along with pore size distribution determine the performance of such materials in construction applications. The performance includes the mechanical properties such as strength and durability properties including the ingress of chloride and sulphate ions. The total porosity in the system has a noticeable effect on the mechanical properties of construction materials , whereas the pore size distribution will mainly affect the durability properties. Concrete with the same total pore volume can exhibit entirely different properties, depending on pore size that is if it has a small number of large pores or large number of small pores. Concrete is a porous material and contains pore structures which are complex and inhomogeneous. The fine and

Rebound hammer test is undertaken using Schmidt’s hammer L-type (N-type for concrete material). Test procedure is simple and equipment is portable and easy to operate. Test can be undertaken on site and the number of test is

The research seeks to compare the difference in measurement of flexural strength of palm kernel shell (PKS) concrete, using direct and indirect methods (beam and splitting cylinder specimen).The Palm kernel shell (PKS) was subjected to various physical tests and values obtained are as follows; specific gravity of Palm kernel shell (PKS) 1.3, Aggregate impact value 10.23.The Concrete was cast using two mix ratios 1:1.5:3 and 1:2:4. The concrete cubes, cylinders, and beams were crushed at 7, 14 and 28days in other to determine the compressive strength and flexural strength of the concrete for the various mixed. The 28th day compressive strength was 12.30N/mm2 and 20N/mm2, for the two mixed ratio respectively. The 28th day flexural strength was 2.03N/mm2 and 1.10N/mm2 for the beam and cylinder specimen respectively. The student t-test showed that there is no significant difference between the tensile strength measured using direct and indirect