Prism compressive strength fcp

The compressive strength of 150×150×300mm prism, cured in standard condition, 28 days.

The relation of prism compressive strength and compressive strength is

fcp=0.7～ 0.8fcu

§4.4.5 Other strength §4.4.5 Other strength

• Tensile strength Tensile strength is tested through is tested through split tensile testsplit tensile test

• Split tensile test Split tensile test strength strength experiment is experiment is shown in the shown in the videovideo

Tensile strengthTensile strength

Tensile strengthTensile strength• PrinciplePrinciple

– Fig. 4.4.6Fig. 4.4.6 is the ketch map is the ketch map of split tensile test.of split tensile test.

– Apply linear load Apply linear load distributed evenly on two distributed evenly on two opposite surface, thus the opposite surface, thus the tension stress will be tension stress will be produced on the vertical produced on the vertical surface affected by the surface affected by the external force. external force.

– This force will be This force will be calculated by the elastic calculated by the elastic theory.theory.

Fig. 4.4.6 Sketch Map of Split Tensile Test

Split tensile testSplit tensile test strength f strength ft st s

P—damage load, N A—split area of specimen, mm²

A

P

A

pf ts 637.0

2

Tensile strengthTensile strength

Bending strengthBending strength Bending strength is tested through middle third poi

nt loading experiment test, Fig. 4.4.7 is the sketch map bending test of concrete, Specimen ： 150×150×600(550)mm beam specimen.

Fig. 4.4.7 Sketch Map Bending Test of Concrete

2bh

PLfm

Bending strengthBending strength