Effects of Polypropylene Fibers on the Frost Resistance of Natural Sand Concrete and Machine-Made Sand Concrete.

Conclusions Before the freeze–thaw cycle, the overall compressive strength of PFNSC increased with the increase in PPF volume content and length, and the overall PFMSC showed a decreasing trend with the increase in PPF volume content and length.

also in 47,180 other papers

When the fiber increased from 6 mm to 19 mm (1.8 MPa), the strength of the specimen showed a trend of first increase and then decrease, and when the fiber length was approximately 10 mm, the tensile strength reached the maximum.

also in 53,322 other papers

With an increase in age and in the replacement rate of machine-made sand, the compressive strength of concrete showed an increasing trend.

also in 63,971 other papers