

river rock– Southside 1" x #4 Round Rock
Developed primarily as an ingredient for portland cement concrete, Southside 1" x #4 Round Rock has a wide variety of uses. It can be used for septic leach fields, pipe bedding, under concrete slabs, and as backfill for retaining walls and drainage blankets. It is an ingredient of Southside Class II Permeable and ¾" concrete aggregate mix (dry aggregate material only). In landscaping applications it is used as a decorative aggregate and as an ingredient of the streambed gravel blend. This material has a tendency to be light tan or brownish color when dry.

Sieve Analysis
INCHES	MM / UM	SOUTHSIDE GRADING	CAL TRANS SECTION 90	ASTM C-33
1"	25 mm	100	88 – 100	95 – 100
3/4"	19 mm	85	70 – 100; x=85
1/2"	12.5 mm	35		25 – 60
3/8"	9.5 mm	8	0 – 30; x=15
#4	4.75 mm	1	0 – 16	0 – 10
#8	2.36 mm	1	0 – 6	0 – 5

ASTM SPECIFICATIONS & PHYSICAL PROPERTIES
Specific Gravity	2.5