NOTE: This paragraph will be included only if the
project has aesthetic considerations where future
maintenance must exactly match the color of the
block.
**************************************************************************
At the completion of work the Contractor shall provide [_____] paving
blocks matching those used in the project. These paving blocks shall be
delivered stacked on pallets.
PART 2
PRODUCTS
2.1
MATERIALS
2.1.1
Bedding and Jointing Sand
**************************************************************************
NOTE: If the pavement is to be subjected to Design
Index traffic of 8 or higher, both the bedding and
jointing sands will consist of 100 percent crushed
sand, if it is available in the construction locale.
For block pavements to be used for walkway,
driveway, storage area, parking area, or subject to
traffic Design Indexes of 1 or 2, the bedding sand
gradation can be changed to the fine aggregate
gradation in ASTM C 33 with the additional
requirement of 0-10 percent passing the 0.075. mm
(No. 200) sieve.
**************************************************************************
Two separate sand gradations shall be used for the bedding layer and in the
block joints. Both sand gradations shall consist of crushed sand, natural
sand, or a combination of crushed and natural sand. Both sand gradations
shall have a minimum L.A. Abrasion of 40 percent when tested in accordance
with ASTM C 131. Both sand gradations shall be nonplastic when tested in
accordance with ASTM D 4318 and shall be free of lumps, clay, vegetation,
soft particles, sulphates, and other contaminants. The bedding and
jointing sands shall conform to the following gradations, determined in
accordance with ASTM C 136 and ASTM C 117, using ASTM E 11sieve.
Percent Passing
_________________
Sieve
Bedding Sand
Jointing Sand
(ASTM E 11)
______________________
______________
_______________
9.5 mm
100
100
4.75 mm
80-100
100
2.36 mm
60-90
95-100
1.18 mm
25-70
70-100
0.600 mm
10-35
40-75
0.300 mm
5-20
10-40
0.150 mm
0-10
2-25
0.075 mm
0-5
0-10
SECTION 02780
Page 6
Previous Page
