3. The SBCM(5–20%) specimens have similar fluidity to that of
OPCM specimen, which established their suitable workability.
The setting times of the SBCM specimens were also
slightly shorter, which has little effect in the engineering
practice.
4. The weight measurements revealed that the weights of the
SBCM specimens increased with curing age. The weight
increase trend of SBCM specimens are similar to OPCM,
which is indicative of the pozzolanic reaction and coincides
with the increased compressive strength.
5. In the SBCP specimens, the intensities of the Q1 and Q2
peaks increase with the curing time, which indicates that
an increase in the curing time increases the number of
polysilicate anions in C–S–H.
The proposed method provides a new application of recycling
LED sludge as a resource. The test results for the LED sludgeblended
cement mortar demonstrate the feasibility of partially
replacing cement with LED sludge powder in construction materials.
Furthermore, this LED sludge cement mortar is effective in preventing
environmental pollution and compatible with the
demands of sustainable development.