Effect of acidic and basic water on the geomechanical properties of limestone used in decoration of buildings in Iraq.

Heyam Saleh Daod, Kamal Ahmad Rashed and Farouk Abdullah Rasheed

Irrigation Department, University of Sulaimani, Kurdistan Region-Iraq,
Civil Department, University of Sulaimani, Kurdistan Region-Iraq,
Irrigation Department, University of Sulaimani, Kurdistan Region-Iraq,


The physico-mechanical properties of rock play an important role in planning and
designing of civil constructional work. A type of stone used in decoration of buildings in
Iraq traditionally known as (Halan rock), has been taken to check variation in its physico-
mechanical properties. Thirty two specimens of dimension 4.8cmx4.8cmx10cm of
fossiliferous limestone of Lower Fars Formation were collected. Different pH solution
from (pH1, pH3, pH5, pH7, pH9, pH11 and pH13) have been used to find the durability
of the stone. Laboratory test also includes effective porosity, both dry and saturated unit
weight, water absorption, uniaxial compressive strength, point load strength, and
modulus of elasticity together with thin section analysis. The results indicated that the
limestone appears to be less resistant to the atmospheric factors. The uniaxial
compressive strength and point Load strength decrease under acidic and alkaline

Key Words:

limestone, physical-


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