3/26/2023 0 Comments Flexture modulusNevertheless, the lower modulus of elasticity could be an advantage as this type of concrete has ductility characteristics. Hence, when load is applied, the OPS undergo higher strain, resulting in lower modulus of elasticity. Generally, OPS is of organic origin and has less restraining effect due to lower aggregate stiffness when compared to crushed granite aggregate. Another important aspect on the improvement of the modulus of elasticity was the restraining effect. The lower modulus of elasticity of OPSC is generally attributed to the lower stiffness and particle density of OPS. It should be noted that for normal weight concrete with crushed granite aggregates produce high modulus of elasticity values compared to OPSC or other LWA concretes ( Alengaram et al., 2011). The addition of silica fume enabled stronger bond between the aggregate and the matrix enabling it to sustain higher strains. Thus, the influence of sand content and the mineral admixtures on the modulus of elastic of concrete was very evident. The mix OPSC with a sand-to-cement ratio of 1.6 produced the highest 28-day modulus of elasticity of about 11 kN/mm 2, which was nearly 10% more than OPSC with a sand-to-cement ratio of 1.2. The sand and aggregate contents influence the modulus of elasticity. The lower stiffness and the shape of aggregates also tend to affect the mechanical properties of the concrete. Overall, the range of flexural and splitting tensile strengths were in the range of 6%–10% and 10%–15% of the compressive strength, respectively. play a vital role in the development of the flexural and splitting tensile strengths. Similar to the compressive strength, the effect of sand-to-cement ratio, cement content etc. The increase of modulus of rupture and splitting tensile strength with increasing sand content showed that the mechanical properties improved as the density increased. Johnson Alengaram, in Handbook of Sustainable Concrete and Industrial Waste Management, 2022 Other mechanical properties of OPSC Read more Navigate DownĮnunciation of lightweight and self-compacting concretes using non-conventional materials Products that develop good CCS are sometimes unacceptable because of other physical property deficiencies. Particle distribution and packing are very important in developing good CCS-and cement maturity, while important, does not affect this measurement as much as it does MOR. Cold Crushing Strength (psi, kg/cm 2)Ĭold crushing strength (CCS) is a compressive test that measures the ability of a product to withstand a given load, normally measured at room temperature after firing to specific temperatures. The particle size and packing of the aggregate system are factors in MOR, but the maturity of the cement bond contributes more to MOR values. For castables, it measures the bonding strength of the cement matrix. MOR measures the bond strength of the test specimen. Modulus of rupture (MOR) is like a three-point bend test. Reza Sadeghbeigi, in Fluid Catalytic Cracking Handbook (Third Edition), 2012 Strength Modulus of Rupture (psi, kg/cm 2)
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