Laboratory for Testing of Construction Materials

The laboratory is accredited according to the requirements of the SRPS ISO/IEC 17025: 2017 standard (Certificate of Accreditation, accreditation number 01-288 with the assigned scope of accreditation issued by the Accreditation Body of Serbia). Laboratory for Testing of Construction Materials of 1. Maj Nis Institute deals with laboratory testing of the quality of construction materials. The Laboratory offers field or laboratory testing services to designers, contractors, supervisory bodies and investors in the field of construction. The implementation of physical and mechanical testing of construction materials is aimed towards meeting the client requirements and business improvement with mandatory compliance with legal requirements and the reference standard for accreditation. The Laboratory has the latest equipment for testing asphalt, bitumen, concrete, stone and geomechanical testing. The expertise and competence of the staff is confirmed by maintaining accreditation for conformity assessment activities according to the assigned scope of accreditation.

The main processes (testing methods) in the Laboratory are:

• - Determination of the maximum density;

• - Marshall test;

• - Determination of bulk density of bituminous specimens;

• - Determination of particle size distribution;

• - Soluble binder content;

• - Determination of needle penetration;

• - Determination of the softening point - Ring and Ball method;

• - Determination of water content;

• - Determination of particle size distribution;

• - Determination of liquid and plastic limits;

• - Test methods for laboratory reference density and water content - Proctor compaction;

• - Test method for the determination of California bearing ratio, immediate bearing index and linear swelling;

• - Determination of compression modulus by circular slab method;

• - Determination of sand soil equivalent;

• - Determination of particle size distribution - Sieving method;

• - Determination of the water content by drying in a ventilated oven;

• - Determination of fine particles with the wet sieve analysis;

• - Determining the contents of clay lumbs;

• - Testing of mineral filler - The determination of grain size distribution;

• - Determination of compressive strength of test specimens;

• - Concrete, hardened — Determination of density;

• - Concrete, compacted fresh — Determination of density;

• - Fresh concrete — Determination of the consistency — Slump test;

• - Methods of testing cement - Determination of fineness;

• - Methods of testing cement - Determination of setting times and soundness;

• - Testing of soil - Determination of deformation by circular plate load test;

• - Testing of soils - Determination of density of soil in place by the sond-cone method;

• - Laboratory testing of soil - Determination of bulk density.