NIA IV-B conducts first quality assurance and materials testing seminar for engineers

Oriental Mindoro - To equip NIA IV-B engineers engaged in construction management of infrastructure projects with essential knowledge in ensuring quality structures, NIA IV-B conducted its first seminar on Quality Assurance and Materials Testing last August 24-26, 2016 at NIA IA Training Center, Bayanan II, Calapan City, Oriental Mindoro. Said activity was participated by engineers from five provinces of the region.

Engineering and Operations Division Acting Manager Engr. Cesar M. Pobre said that the training will refresh and enhance knowledge of engineers in the region who are engaged in project implementation. He added that it will be beneficial in ensuring the quality of infrastructures constructed by NIA.

Engr. Edison Odongan and Engr. Mary Rose N. Reyes of NIA Central Office served as the resource speakers who discussed topics such as construction materials for roads, diversion structures, canal structures and protection works, quality control of construction materials and methods of sampling and testing.

The first test was the Sieve Analysis, also Gradiation Test or Grading Test, which is essential to evaluate the distribution of aggregate particles by size in given sample. This test is important to check compliance to standard aggregate blends and is a very good control and quality acceptance tool.

Another topic is the determination of soil’s liquid limit which is defined as the minimum water content at which the soil is still in the liquid state, but has a small shearing strength against the flow.

The next test is the determination of Field Density/In-situ Density or Compaction Test. Methods for this test include Sand and Cone Method, Sand Replacement Method and Nuclear Method.

Ensuring the good quality of concrete was given emphasis in the training seminar as well as testing of reinforcing steel and PVC waterstop.

The participants also underwent hands-on sampling and testing at the provincial office of Department of Public Works and Highways (DPWH). The participants prepared the cylinder sample and performed compressive strength test for concrete, bending and tensile strength test of reinforcing steel bar (RSB) and compaction test.

This seminar hopes to improve the construction of irrigation infrastructures of NIA in the region.#Aileen Vernice G. Bahia, Regional Office