3.3. Total void ratio, density, and water permeability tests of LWPCs
Total void ratio and density of samples was tested in accordance
with ASTM C1754 [28]. With the recommendation of ACI 522 [29],
the water permeability coefficient of LWPC was measured using
the constant head method. To prevent flow between sample and
surface of measuring cylinder, the side of cylindrical sample was
wrapped by rubber tube and tightened by circular clamps. The
time required for a quantity of water to flow through was measured
after a steady state flow. The coefficient of water permeability
was calculated following Darcy’s Law as shown in the following
equation:
k ¼ QL=HAt ð1Þ
where k is the water permeability coefficient (cm/s), Q is the quantity
of water collected (cm3) over time t (s), L is the length of specimen
(cm), H is the water head (cm), and A is the cross sectional
area of the specimen (cm2).
3.3. Total void ratio, density, and water permeability tests of LWPCs
Total void ratio and density of samples was tested in accordance
with ASTM C1754 [28]. With the recommendation of ACI 522 [29],
the water permeability coefficient of LWPC was measured using
the constant head method. To prevent flow between sample and
surface of measuring cylinder, the side of cylindrical sample was
wrapped by rubber tube and tightened by circular clamps. The
time required for a quantity of water to flow through was measured
after a steady state flow. The coefficient of water permeability
was calculated following Darcy’s Law as shown in the following
equation:
k ¼ QL=HAt ð1Þ
where k is the water permeability coefficient (cm/s), Q is the quantity
of water collected (cm3) over time t (s), L is the length of specimen
(cm), H is the water head (cm), and A is the cross sectional
area of the specimen (cm2).
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