STONES

CLASSIFICATION OF STONES

A. GEOLOGICAL CLASSIFICATION

B. PHYSICAL CLASSIFICATION

C. CHEMICAL CLASSIFICATION 

TEST OF STONES

1. ACID TEST

• To check weather resistance
• Dipping the specimen in hydrochloric acid for three days
• If a white specimen formed in the specimen, indicates the presence of calcium carbonate which showing that the stone have poor weathering capacity

2. ATTRITION TEST

• To check wear stones used in road construction
• Carried out in Deval's attrition test machine

3. CRUSHING TEST

• It is the maximum area at which its samples crushes or fails divided by the area of the bearing face of the specimen
• Specimen Size = 4cm x 4cm x 4cm
• Number of specimen = 3