The cement content of a concrete is 375 kg/m3 and the w/c ratio is 0.46. At a specific moment of the cement hydration, the degree of hydration is 0.80. Calculate the volume (dm/m³) of the following: (i) chemically bound 2 water, (ii) gel water and (iii) capillary water

Structural Analysis
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Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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The cement content of a concrete is 375 kg/m3 and the w/c ratio is 0.46. At a specific moment of the cement
hydration, the degree of hydration is 0.80. Calculate the volume (dm/m³) of the following: (i) chemically bound
water, (ii) gel water and (iii) capillary water
A concrete sample was extracted from a structure and dried at 105 °C in which 80 kg/m3 of water evaporated. The
degree of hydration (a) was determined to be 0.5. The mix design of the concrete was 1:6.0:0.6
(Cement:Aggregates:Water mix ratio by weight) and the target air content was 3 %.
a) How much of the water had been evaporated prior to drying at 105°C?
b) What were the volume of (i) un-hydrated cement, (ii) solid part of cement gel, (iii) gel water, (iv)
contraction pores, and (v) capillary pores at the time of sampling?
Transcribed Image Text:The cement content of a concrete is 375 kg/m3 and the w/c ratio is 0.46. At a specific moment of the cement hydration, the degree of hydration is 0.80. Calculate the volume (dm/m³) of the following: (i) chemically bound water, (ii) gel water and (iii) capillary water A concrete sample was extracted from a structure and dried at 105 °C in which 80 kg/m3 of water evaporated. The degree of hydration (a) was determined to be 0.5. The mix design of the concrete was 1:6.0:0.6 (Cement:Aggregates:Water mix ratio by weight) and the target air content was 3 %. a) How much of the water had been evaporated prior to drying at 105°C? b) What were the volume of (i) un-hydrated cement, (ii) solid part of cement gel, (iii) gel water, (iv) contraction pores, and (v) capillary pores at the time of sampling?
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