The lateral pressure on column formwork due to freshly placed concrete is primarily influenced by:
Choose the correct answer
Design compressive strength of concrete
Rate of placing concrete and ambient temperature
Grade of cement and fineness modulus of aggregate
Type of admixture used in the concrete mix
Correct Answer
B. Rate of placing concrete and ambient temperature
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Lateral pressure = ρgH for very slow pouring. At higher pour rates, concrete behaves as a fluid and pressure builds up. Higher temperature accelerates hydration and early stiffening, reducing pressure. Rate of pour and temperature are the primary design variables per ACI 347 and IS guidelines.
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