Civil Engineering Exams (Civil Design) – Flashcard Mode

A trial batch for normal weight concrete with an average 28th day compressive strength of 42 MPa is to be proportioned based on the following:

Slump	50 mm to 100 mm
WC ratio by weight	0.41
Sp. gr. of cement	3.15
Sp. gr. of coarse aggregate	2.68
Sp. gr. fine aggregate	2.64
Water (net mixing)	200 kg/m3
Volume of rodded coarse aggregates	0.64 m3/m3
Unit Weight of Sand	15.7 kN / m3
Unit weight of concrete	23.6 kN/m3

How much is the required weight of the dry sand?