Materials Engineering Responsibilities and Standards

What is not required in conducting nuclear density test?

Which of the following is not the responsibility of a materials engineer?

Where should the contractor's Materials Engineer directly report?

Which of the following documents is prepared by a Materials Engineer?

During construction of a road project, if all the materials to be used are tested for quality, inspection is no longer required.

Sample should be taken and sent to the regional offices or any private testing laboratories accredited by DPWH for testing, with a

As a Materials Engineer, what will you do with major honey-combed area that is considered as defective work?

If the strength of control specimen does not meet the requirements and not feasible to obtain cores due to structural consideration, as a Materials Engineer what will be your decision?

A program of quality control works to be complied by the contractor which is prepared by DPWH:

What is the average deficiency in thickness of core specimen per lot where no payment is recommended on the project?

Nuclear Density Test Requirements

Operator must be licensed
Radiation exposure limits must be specified
Units must be delivered in approved cases

Materials Engineer Responsibilities

Getting samples for testing
Analyzing test results
Recording concreting activities in the materials logbook
Reporting directly to DPWH Project Engineer
Preparing materials logbooks

Compaction of Embankment

80% compaction is below the required 100%
Adjust water content
Use rollers with higher compactive efforts

Materials Engineer Job Duties

Submitting samples for testing
Preparing design mixes
Checking job mix formulas
Surveying and measuring line and grade (optional)

Material Testing and Quality Control

Sample testing at regional offices or private labs accredited by DPWH
Quality control is still needed if all materials are tested for quality

Defective Work (Honeycomb)

Defective areas must be removed and replaced at contractor's expense

Control Specimen Strength

If strength does not meet requirements, and cores are not feasible, payment is adjusted

Bridge Project Piling

Piling length is determined using test piling

Concrete Acceptance Criteria

Acceptance/rejection of construction materials is based on materials test reports

Monthly Materials Status Report

Submitted to DPWH by the 25th day of the month

Subgrade Preparation

Compaction of soil topping, cut fills and materials in embankments, and treatment of unsuitable materials

Concrete Acceptance

Adequate average concrete cores strength is 85% of specified f'c, with no single core below 75%

Asphalt Pavement Testing

Completed asphalt pavements with excessive voids are usually caused by inadequate rolling at temperatures that are too low, too much course aggregate , too little binder, too much fine aggregate

This quiz covers essential responsibilities and requirements for materials engineers, including testing procedures, compaction standards, and quality control measures. Learn about key duties such as sample analysis and logbook maintenance, as well as standards set by DPWH. Perfect for those in the construction and engineering fields.