A. Concrete Hollow Blocks (CHB), are one of the most extensively used walling materials in the Philippines.
B. A small hand tool with a flat blade used for spreading and smoothing mortar or plaster.
C. A cement is a binder, a substance used for construction that sets, hardens, and adheres to other materials to bind them together.
D. Sand is a granular material composed of finely divided rock and mineral particles.
E. Gravel is a loose aggregation of rock fragments.
