Services | QSTI - Qualitest Solutions & Technologies, Inc.

01 / Laboratory Services

Material Testing

Reliable testing helps engineers and builders make informed decisions about construction materials.

Steel Testing

Using an advanced computer-controlled 120-ton capacity Universal Testing Machine (UTM), test results are immediately available on the day of testing with real-time graphical output, including load-deformation graphs, yield and tensile strengths, stress-strain curves, and load rate.

Steel products of different types and shapes—such as plates, rolled sections, deformed bars, light gauge sections, pre-stressing strands, and alloys—are tested with accurate and swift results.

Steel specimens prepared for material testing

Concrete Testing

Using a 150-ton compression machine, compressive strength is determined for concrete cylinders, concrete core specimens, pavement blocks, mortar cubes, and concrete hollow blocks. Flexural strength of concrete beams is also tested using the UTM or compression machine.

Two- to six-inch coring of slabs and pavement is conducted for depth determination and compressive-strength assessment. Schmidt hammer rebound testing is conducted to assess uniformity and continuity.

Soil & Aggregate Testing

QSTI provides laboratory and field testing to help characterize soil and aggregate properties for engineering and construction projects.

Laboratory tests

Moisture content, grain size analysis, Atterberg’s limits, specific gravity, unit weight, classification, and absorption
Los Angeles abrasion, wash loss, soundness, clay lumps, relative density, and organic impurities
Standard and modified compaction, CBR, consolidation, permeability, and pH value
Unconfined compression, triaxial testing (UU, CU, CD), and direct shear test

Field tests

Standard Penetration Test (SPT), Field Vane Test, and Field Density Test (FDT)
Plate Load Test, rock core logging, field permeability, test pits, and disturbed/undisturbed sampling
Field California Bearing Ratio (CBR)

02 / Site Investigation

Subsurface Soil Investigation

Geotechnical investigation supports safer, more economical design for structures and infrastructure.

Prior to the design of structures, port facilities, real estate developments, infrastructure, and buildings, geotechnical investigation is an indispensable engineering process for a safe, economical, and effective structure. Alongside its material testing laboratory procedures and equipment, QSTI implements different modes of subsurface soil investigation according to site conditions and project requirements. Drilling and sampling equipment use rotary drilling rigs with appropriate rods, bits, and flight augers as required.

Offshore Soil Boring

Offshore boring is necessary for the design of ports, jetties, wharfs, bridges, and other offshore facilities. Drilling and field testing are performed aboard a 20-ton floating pontoon assembled efficiently on site.

Land-Based Soil Boring

Buildings, towers, stadiums, dams, real estate developments, road alignments, slopes, and other land-based structures or ground modifications require reliable soil investigation. Depending on specifications, investigation may be vertical, inclined, or horizontal.

Engineering Information for Design

The investigation provides valuable information for the design, modification, and evaluation of a construction site. Outputs may include soil engineering properties, subsurface geologic profile, groundwater-table location, site seismicity, recommended soil bearing capacities, driven and bored pile capacities, subgrade modulus, liquefaction potential, settlement and settlement rate, and other construction-related recommendations.

03 / Environmental Monitoring

Geo-Environmental Monitoring

Monitoring helps projects understand site conditions and potential environmental effects.

Site Sampling & Groundwater Monitoring

As part of social responsibility, companies are increasingly concerned about the effects of development. Monitoring through site sampling and the installation of vertical pipes for ground seepage and efflux monitoring has become standard practice. QSTI serves clients in this category, including industrial petroleum establishments.

04 / Engineering Solutions

Foundation Engineering Solutions

Practical approaches to foundation rehabilitation, modification, and improvement.

Safe, Appropriate & Economical Solutions

Rehabilitation, modification, and improvement of foundations are common challenges in the construction industry. The challenge is to determine and provide the most economical, appropriate, safe, and effective foundation solution.

QSTI strives to design and provide applicable solutions such as compaction grouting, chemical grouting, permeation grouting, slab jacking, mud-jacking, or a combination of methods appropriate to project requirements.

When you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot express it in numbers, your knowledge is of a meager and unsatisfactory kind.

— Lord Kelvin, Mathematical Physicist

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