Page 162 - Water Standards
P. 162
shall be fully filled in mortar, tamped solidly, pressed
smoothly, and trowelled.
3) Precast slabs shall not be laid until the foundation trench
has been excavated and the foundation stone has been in⁃
stalled. For channels with soil slopes, the space between
a precast slab and the soil slope should be filled solidly
with sand or loam during masonry. For channels with stone
slopes, the space between a precast slab and the stone
slope should be filled solidly with mortar or concrete
during masonry. The top precast slabs shall be filled
smoothly with mortar, and then a sealing capstone shall
be installed.
3 4 8 Membrane anti⁃seepage shall be constructed according to the
relevant requirements in SL/ T 231
3 4 9 Asphaltic concrete anti⁃seepage shall meet the following re⁃
quirements:
1 Asphaltic mixtures shall be mixed according to the selected
mix proportion of asphaltic concrete.
2 In⁃situ paving construction shall meet the following require⁃
ments:
1 ) For anti⁃seepage structures with leveling cementation
layers, the leveling cementation layer may be paved
first, and then the anti⁃seepage layer shall be paved.
2) Heat preservation measures shall be employed for transpor⁃
tation tools for asphaltic mixtures to ensure the in⁃situ
temperature of the asphaltic mixture is not lower than the
paving control temperature.
3) Anti⁃seepage layers shall be paved uniformly according to
the paving thickness determined by in⁃situ tests. The
compaction coefficient should be determined by tests,
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