AGGREGATE SPECIFICATIONS COMPARED TO STEVIN ROCK LIMESTONE OF KHOR KHWAIR QUARRY

SL.NO.	TEST	TEST METHOD	PERMISSIBLE LIMITS		TYPICAL SR MATL.		COMMENTS
			FINE	COARSE	FINE	COARSE
1	Grading	BS 812 P-103	BS 882	BS 882	BS 882	BS 882	Within limits
2	Material finer than 75 mic.	BS 812 P-103
	a) Crushed rock		<10 %	<1 %	7-9 %	<1%	For normal SR matl.
3	Clay, silt and dust	BS 812 P-1	<15 %	<3 %	7-9 %	<1%
4	Clay lumps and friable	ASTM C-142	-	<1%	-	<1%	Within limits
	particles
5	Light weight pieces	ASTM C-123	<0.5 %	<0.5 %	<0.1%	<0.1%
6	Organic impurities	ASTM C-40	Lighter	-	Lighter	-	Within limits
			than ref.		than ref.
			colour		colour
7	Water absorption	ASTM C-128,127	<2.3 %	<2 %	0.7-0.9%	0.3-0.4%	Within limits
8	Specific gravity (apparant)	ASTM C-128,127	>2.6	>2.6	2.70-2.73	2.70-2.73	Within limits
9	Shell content	BS 812 P-106
	a) Coarser than 10mm		-	<5 %	-	Nil	Within limits
	b) Between 5 and 10mm		-	<15 %	-	Nil	Within limits
	c) Between 2.36 and 5mm
10	Particle shape
	a) Flakiness index	BS 812 P-105.1		Varies depending on application
	i)  10-20mm					12-18 %
	ii) 5-10mm					22-30 %
	b) Elongation index	BS 812 P-105.2
	i) 10-20mm					25-35 %
	ii) 5-10mm					22-30 %
11	Acid soluble chlorides, Cl	BS 812 P-117	<0.03%	<0.01%	0.01-0.02%	0.01%	Within limits
12	Acid soluble sulphates,	BS 812 P-118	<0.3 %	<0.3 %	0.04-0.08 %	0.04-0.08%	Within limits
	SO3
13	Soundness, MgSO4	ASTM C-88	<12 %	<12 %	<4 %	<2 %	Average <1.0%
14	Mechanical strength
	a) 10% fines value or	BS 812 P-111	-	>100 kN	-	150-200 kN	Within limits
	Impact value	BS 812 P-112	-	<30 %	-	16-24 %	Within limits
	b) Los Angeles abrasion	ASTM C-131	-	<30 %	-	26-30%
15	Drying shrinkage	BS 812 P-120		<0.05 %		0.03%	Within limits
16	Potential reactivity	ASTM C-289		Innocuous		Innocuous