Splitting tensile strength

Splitting tensile strength of cylindrical concrete specimens Microscopic determination of parameters of the air-void system in hardened concrete... 

The tensile strength can be measured in two ways (1) direct tensile strength from dumbbell specimens (2) splitting tensile strength from cylinders. Alternatively... 

ASTM C 496-71, Splitting Tensile Strength of Cylindrical Concrete Specimens, Part 10 (1973). 

Extensive studies have been conducted on the use of recycled tyre to modify concrete and mortars [4-6]. The literature about the use of tyre rubber particles in cement-based materials focuses on the use of tyre rubber as an aggregate in concrete and evaluates only the mechanical properties. Results have indicated that rubberized concrete mixtures show lower density, increased toughness and ductility, higher impact resistance, lower compressive and splitting tensile strength, and more efficient sound insulation. 

M.F.M. Zain, H.B. Mahmud, A. Dham, M. Faizal Prediction of splitting tensile strength of high-performance concrete. Cement and Concrete Research 32 (2002) 1251-1258. 

ASTM C 496/C 496M. 2011. Standard test method for splitting tensile strength of cylindrical concrete specimens. West Conshohocken, PA ASTM International. 

Silsbee et al. (1991) studied materials that had been prodneed by eombining ealeined gibbsite or an X-ray amorphous form of alumina with phosphorie acid and by subsequent heat treatment at temperatures between 60 and 300 °C. The stmctuie of the resultant material was characterized by the presence of residual unreacted material (gibbsite crystals) embedded in an amorphous aluminum phosphate matrix The amorphous fraction exhibited some heterogeneity on a very fine scale. Splitting tensile strengths between about 10 and 20 MPa were attained. 

Hardened concrete properties were determined from six 150-mm x 150-mm x 150-mm cubes. After 24 h, concretes were removed from the mold and cured in lime-saturated water until the age of tests. Compressive strength tests and splitting tensile strength test were performed to determine hardened concrete properties. The results of these tests are given in Table 6. 

Concrete code Compressive strength (MPa) 7 days 28 days Splitting tensile strength (MPa) 28 days... 

The splitting tensile strengths were determined on concretes in accordance with EN 12390-6 (2009) (Table 6). The results at 28-days varied between 1 and 3.5 MPa. Maximum splitting tensile strength values belonged to AKT, and the minimum values belonged to KM5. 

Figure 1. Results of compressive and splitting tensile strength of hardened concrete samples.

I Compressive strength 7 days Compressive strength 28 days I Splitting tensile strength 28 days... 

State Standard 21153. 3-85. 1985. Rocks. Methods of definition of splitting tensile strength. Moscow. 

The intercalation of poly(acrylamide)-montmoriUonite superabsorbing polymer composites (SAPCs) into an aluminate cement matrix leads to a noticeable improvement in the mechanical properties of the hardened cement paste. The addition of as little as 0.6% SAPCs increases the compressive strength from 36.1 to 44.4MPa, the modulus of elashcity from 7.8 to 11.1 GPa, and the split tensile strength from 3.3 to 7.0MPa, for a W/C ratio of 0.4 (Gao et al, 1997). 

These concrete specimens were made with mix proportions of 1 1.87 3.36 and w/c=0.57. The maximum grain size is 20 mm. All the specimens were tested between 28-32 days after they were casted. The cubic compressive strength f u is 35.2 MPa, and the splitting tensile strength ft is 2.45 MPa. The modulus of elasticity Ec is 31000 MPa. 

The shear strength, splitting tensile strength and rupture modulus (Fig.2,3 and 6 ) are improved by addition of 2% fibres by 35 percent, 44 percent and 55 percent, respectively. 

Figure 7.13 Splitting tensile strength as a function of the number of fibres intersecting the fractured section [29],...

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