Posted On :

The specific gravity and water absorption of aggregates are important properties that are required for the design of concrete and bituminous mixes.

**Specific Gravity and water absorption**

The specific gravity and water absorption of
aggregates are important properties that are required for the design of
concrete and bituminous mixes. The specific gravity of a solid is the ratio of
its mass to that of an equal volume of distilled water at a specified
temperature. Because the aggregates may contain water-permeable voids, so two
measures of specific gravity of aggregates are used:

apparent
specific gravity and bulk specific gravity.

Apparent Specific Gravity, Gapp
, is computed on the
basis of the
net volume of aggregates i.e the volume excluding water-permeable voids.Thus

where, MD is the dry mass of the aggregate, VN is the net
volume of the aggregates excluding the volume of the absorbed matter, W is the
density of water.

Bulk
Specific Gravity, Gbulk , is computed on the basis of the total volume of
aggregates including water permeable voids. Thus

where, VB
is the total volume of the aggregates including the volume of absorbed water.

Water absorption, The difference between the apparent and bulk
specific gravities is nothing but the water-permeable voids of the aggregates.
We can measure the volume of such voids by weighing the aggregates

dry and
in a saturated, surface dry condition, with all permeable voids filled with
water. The difference of the above two is MW . MW is the weight of dry
aggregates minus weight of aggregates saturated surface dry condition. Thus

The specific gravity of aggregates normally used in road
construction ranges from about 2.5 to 2.9. Water absorption values ranges from
0.1 to about 2.0 percent for aggregates normally used in road surfacing.

Tags : Civil - Highway Planning and Alignment - Highway Construction Materials And Practice

Last 30 days 28 views
Related words : ### What is Highway Construction: Specific Gravity and water absorption Define Highway Construction: Specific Gravity and water absorption Definition of Highway Construction: Specific Gravity and water absorption where how
meaning of Highway Construction: Specific Gravity and water absorption
lecturing notes for Highway Construction: Specific Gravity and water absorption lecture notes question and answer for Highway Construction: Specific Gravity and water absorption answer
Highway Construction: Specific Gravity and water absorption study material Highway Construction: Specific Gravity and water absorption assignment Highway Construction: Specific Gravity and water absorption reference description of Highway Construction: Specific Gravity and water absorption
explanation of Highway Construction: Specific Gravity and water absorption brief detail of Highway Construction: Specific Gravity and water absorption easy explanation solution Highway Construction: Specific Gravity and water absorption wiki
Highway Construction: Specific Gravity and water absorption wikipedia how why is who were when is when did where did Highway Construction: Specific Gravity and water absorption list of Highway Construction: Specific Gravity and water absorption school assignment college assignment
Highway Construction: Specific Gravity and water absorption college notes school notes kids with diagram or figure or image difference between Highway Construction: Specific Gravity and water absorption www.readorrefer.in - Read Or Refer

Recent New Topics :