Cube strength

Fig. 1.37 The relationship between cube strength and tensile strength (Kromlos).

An SPC mix modified with TFS has higher strength indexes (cube strength up to 41MPa). 

Compressive strength class Minimum characteristic cylinder strength, (MPa) Minimum characteristic cube strength, (MPa)... 

Ono presented the following multilinear regressive equation (among several other similar equations), which gives a prediction of 28-day mortar-cube strength ... 

Use of Ono s Table to Interpret Kiln Conditions and Formula to Predict 28-day Mortar-Cube Strength... 

A multiregressional equation predicting the 28-day mortar cube strength was presented by Rao, Akhouri, and Sinha (1992), the data coming from rotary and vertical shaft kiln clinkers. The prediction has a standard deviation of 17.9 kg/cm, utilizing alite and belite percentages and average crystal sizes. 

The photographs in this section are illustrations of clinkers examined and interpreted by this writer, with emphasis on the use of Ono s interpretive table (Table 6-1). It is important to note that individual photographs may not depict all the microscopic features normally associated with the stated interpretation of kiln conditions, the interpretation having been drawn from the results of several techniques of examination and study of several clinkers in the sample. Designations such as 42.8 MPa in the photomicrograph captions indicate reported 28-day mortar-cube strength. 

Alkali sulfates Increased early mortar-cube strength, decreased late strength (Jons, 1981)... 

The designer may choose from a range of asphalt mixtures for asphalt base and binder course, all with graded bitumen, and a range of HBMs, having a 28-day compressive cube strength ranging from 10 to 20 MPa. 

Brick Strength cube Strength Wall thickness Wall Strength... 

The results tabulated indicate that the stresses are well within the limiting cases. Hence reinforcement design based on 500 psi tension allowed for 15°C temperature cross fall on the outer face is safe. It is of interest to note that compressive stress on the inside face of the vessel due to above combination of loads is well within the allowable compressive stress, i.e. 2200 psi for Hunter-ston B concrete mix of 5400 psi cube strength at 28 days. 

Seven concrete elements numbered from 0 to 6 and seven reinforced concrete elements numbered from 7 to 13 were tested (Fig. 1). The elements 0 and 13 did not contain fibres and those numbers 1 and 7 were reinforced with fibres to full depth. The concrete composition for all the elements was as follows cement - 350 kg/m, water-cement ratio 0.6 and maximum grain diameter 10 mm. At the time of testing, after 6 months ageing, the concrete cube strength was 37 MPa. The fibres were smooth, straight, without curved ends, 20 mm long and with 0.2 mm cross-section diameter. The volume contents of fibres was 1.5%. The bar... 

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