It means this mixture provided the optimized arrangement between larger and smaller particles to give a stable aggregate frame and uniform distribution with the smallest pore volume. Therefore, the mixing ratio of 30% sand to 70% gravel was used to design the HPC mixtures for fabricating HPC ...
Fig. 1.Mixing procedure for SFR-SCC. The investigations were carried out on straight and two times bigger hooked steel fibers. The geometry and parameters of steel fibers are presented inTable 3. Three different volume fractions of steel fibers were developed to cover the majority of practically...
(Design) 1,thedesignstrengthgradeisC25,usedforconcretepouring pile,accordingtothe"Regulations"and"ordinaryhighway engineeringcementconcretemixdesignrequirementsthanthe designof"and"highwayengineeringbridgeconstruction technicalspecification"standard.Bymechanicalmixing. 2,thecalculationofthemixtureratio. 3,preliminary...
Hence, Laterite can simply be defined chemically as a material having the ratios of silica to sesquioxide represented by molecular silica-alumina ratio: SiO2/Fe2O3, in the range of 1.33–2.0. Laterite soil with ratios less than 1.33 are considered indicative of true laterites, while those bet...
which enhances interlocking during mixing. While this angular characteristic is advantageous for Kamar-Kalaq, a thorough analysis of its aggregates reveals the presence of voids within them, potentially leading to increased water absorption. Despite the rounded shape of Hari-River’s aggregates, it’...
Unrestrained bulk volume changes were measured by displacement of liquids in which the specimens were submerged. Cement paste and concrete stored under water from the time of molding always showed volume increases of from 0.1 to 1.5 percent, with almost the entire change occurring during the first ...
Evaluation of longitudinal wave velocity and elasticity modulus of concrete at different ages considering mixing ratiosdoi:10.22075/ijnaa.2021.18485.2015Mehdi SabaghMansour Asgari KhorasganiMohammad Taghi KazemiSemnan University
Tomorrow’s cements are targeting lower clinker to cement ratios. Cements today include less than 5% of SCMs, but the industry is targeting increasing SCM amounts to 10% in 2030, 15% by 2040 and 20% by 2050. Leveraging new cement blends Portland cement specifications limit the amount of ...
Considering cement/foam ratios varying from 1 to 3, lightweight concretes with density ranging between 200 and 300 kg/m3 were obtained, while the compressive strength ranged from 0.1 to 0.5 MPa and the thermal conductivity from 0.07 to 0.1 W/m K. Perevozchikov et al. [7] produced light...
In terms of compatibility, the bond strength is both affected by the compressive strength of the SCC overlay and the compressive strength ratios of the overlay and substrate. The authors have recommended using an overlay of higher strength compared to the old concrete substrate. The addition of ...