In order to achieve the objectives of this study, an
experimental plan was developed to create CCA blended
cements. As such three different cement, sand and watercement
(w/c) ratios were used. CCA percentages include
0, 5, 10, 15 and 20% CCA replacement. Specimens were
prepared and cured for 90 days. For all specimens
compressive strength test was conducted following
C109/C109M-12. All tests were conducted for three
replicates. In addition, rheological properties of the
mortar were studied using a Brookfield (DV-III Ultra)
rotational viscometer. The viscosity, torque and shear
stress of each blend was recorded at both 5 and 10
RPM. Data were recorded with 5-min increments over a
span of 20 min. Furthermore, to compare the
workability of 0, 5, 10 and 15% CCA blends, the flow
table test was performed complying with ASTM
C1437-07 standard. Hydraulic cement was placed on a
Flow Table Apparatus and the length of flow was
measured. Finally, thermal conductivity tests were
carried out to determine thermal conductivity of the
new composite. A heat transfer measurement device
was designed and constructed according to the
standards to measure thermal conductivity of the CCA
concrete specimens. Data were collected periodically
every minute over the span of approximately an hour.