Cement-Stabilized Granular Volcanic Ash Materials for Construction of Low-Traffic Roads in Yemen

Table 1

Geotechnical characteristics of two GVA materials.

Property	Value		Test standard [31]
	Red GVA	Black GVA
Apparent specific gravity (Gs)	2.51	2.11	ASTM C 127 and ASTM C 128
Water absorption %	13.37	18.23
Los angeles abrasion %	48	55.9	ASTM C131
Liquid Limit (LL)	Nonplastic	Nonplastic	ASTM D4318
Plasticity Index (P I)	Nonplastic	Nonplastic
Gravel (80–4.75 mm) %	79.29	52.93	ASTM D421
Sand (4.75–0.075 mm) %	20.31	46.77
Fines (less than 0.075 mm) %	0.4	0.30
Uniformity coefficient (Cu)	1	3
Coefficient of curvature (Cc)	2.3	1.2
Classification by unified soil system	(GP)	(GP)	ASTM D2487
Classification by AASHTO system	A-1-a (0)	A-1-a (0)	ASTM D3282
Fineness modulus	5.26	5.47	ASTM C125