Isima

Isima yo kubaka inzu ni ifu y'umuhondo w'ibikoresho biva mu mazi, ibuye n'ishwagara (limestone), ikoreshwa mu bwubatsi. Bayita kandi simu cangwa cement.

Ibintu nyamukuru kuri yo:

1. Ivyo isima ikora:

- Ikoreshwa mu gukora beton (concrete) n’ifu y’iturika.

- Ifatanya n’umusenyi n’amazi, bigatanga urusyo rukomeye rwifashishwa mu kwubaka impome, gukora fondasiyo, n’ibindi.

2. Ubwoko bwa sima:

- Portland cement – ikoreshwa cane ku isi yose.

- Sima ya hydraulic – ifata n’iyo yahuye n’amazi.

- Sima ya blanc – ikoreshwa ahatari hakeneye ibara rikomeye.

3. *Uko ikoreshwa:

- Ivangwa n’umusenyi n’amazi mu rugero runaka.

- Bishobora kongerwamo amabuye kugira ngo habe *beton* yo gusakara cangwa gukora fondasiyo.

4. *Kubika neza:*

- Ntigomba gufatwa n’amazi itarabikwa, kuko yohita yinonekara.

- Ibikwa ahantu humutse kandi hakingiye.