The
compressive strength was determined by dividing the value of failure-load of a specimen with the crosssectional area of the sample.
The mean and coefficient of variation (CV) for
compressive strength of the clear samples are presented in Table 1.
The more basic the fly ash and slag, greater is its early
compressive strength and hydraulic activity in presence of alkaline activators.
The pioneering research conducted by the same authors [13] showed that PCC35 exhibited lower 28-day
compressive strength compared to OPC mortars.
In order to ensure that the design of the concrete mixture met the desired
compressive strength of the concrete, two
compressive strength test objects were taken and tested at 28 days for each concrete quality.
(4) When the specimens have been cured to the 3rd, 7th, 14th, 21st, and 28th days, they are, respectively, tested for
compressive strength and shear strength, crack resistance, drying shrinkage and expansibility, and diameter, weight, and height of the final sample, and then other tests were carried out
The
compressive strength test was carried out using six broken pieces of test prisms remained from the flexural strength tests performed on three samples.
Compressive strength of HSC with and without steel fibres
and Risdanareni et al.'s study on the use of metakaolin as a raw material for manufacturing geopolymer paste found that the
compressive strength of metakaolin-based geopolymer paste reached more than 42 MPa [6,7].
Temperature of curing water also affects the
compressive strength of concrete specimens.