CONSTRUCTION AND EXPANSION JOINTS

A construction joint, or day-work joint, is one where fresh concrete has to be placed on or against concrete that has already hardened. ...

PLACING & COMPACTION OF CONCRETE

The successful placing and compaction of concrete can be achieved only if there has been careful forethought and planning.  Because they ar...

METHODS FOR TRANSPORTING CONCRETE

A number of methods for transporting concrete on site are available, ranging from hand wheelbarrows to concrete pumps. The choice of ...

SITE BATCHING & MIXING

Although most concrete nowadays is delivered ready-mixed, there may be occasions when it is more economic and practicable for the concret...

CONCRETE SPECIFICATION

I t i s possibl e fo r the reactio n t o tak e plac e i n the concret e withou t inducin g expansion. Damag e ma y no ...

HARDENED CONCRETE COMPRESSIVE STRENGTH

Th e strengt h o f concret e i s normall y specifie d b y strengt h class , tha t i s th e 28-da y characteristi c compress...

HARDENING CONCRETE EARLY THERMAL CRACKING

Th e reactio n o f cemen t wit h water - hydratio n - i s a chemica l reactio n tha t produce s heat . I f thi s developme...

GRADING OF AGGREGATES

The proportions of the different sizes of particles making up the aggregate are found by sieving and are known as the 'grading'...