She is convinced the illnesses were caused by quarry dust.
The delays and uncertainty have frustrated those who see danger in the quarry dust, and have divided this town of 17,000.
Amref's Katine project manager, Oscar Okech, said the major materials used for the water jars are cement, galvanised plain wire, chicken wire mesh, quarry dust (coarse sand), river (fine) sand and mud.
b Part of shale quarry dust used for the study.
The specific gravity of quarry dust used was 2.58.
Quarry dust is better placed compared to pond ash.
This prompted to use quarry dust and pond ash as fine aggregate in the present investigation.
This can be achieved by using many marginal materials like fly ash, slag, quarry dust etc.
Open image in new window Fig. 1 Photographs of shale quarry dust at Umuoghara industrial sites.
The grain size distribution of sand, quarry dust and pond ash are given in Fig. 1.
This encourages the efforts of replacing sand with both pond ash and quarry dust.
