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Proposal for Geotechnical & Testing Services <br />City of Ramsey, MN <br />The technicians are equipped with nuclear density gauges to verify the compaction of engineered fill <br />soils. They are also trained in the use of and have access to sand cones for density testing when <br />required by project specifications. <br />NTI maintains plastic concrete testing equipment to perform slump, air content, temperature and the <br />casting of concrete and mortar cylinders for construction projects. We also perform quality control <br />testing during the installation of these pavements by observing subgrade test rolls, verifying subgrade <br />excavation depths and limits, testing aggregate base and bituminous pavements for quality and density. <br />Depending on the construction they are observing that day our technicians will leave the shop <br />equipped with hand augers, coring machines, double ring infiltrometers, plastic concrete test <br />equipment, hand penetrometers, static cone penetrometers, dynamic cone penetrometers, Schmidt <br />rebound hammers, DipStick Floor Profiler, etc. <br />NTI's technicians are trained in proper sampling per ASTM specifications to assure that the samples <br />are indicative of the materials utilized and that they arrive back at the lab in a condition suitable for <br />providing accurate test results. <br />Laboratory Testing — NTI's laboratory is equipped to handle the testing required for typical <br />municipal and building projects. We have an automated cure room that maintains proper temperature <br />and humidity for curing concrete cylinders. We perform a variety of tests on soil to determine moisture <br />density relationships (proctors), mechanical analysis of soil and aggregates for use as fill, or concrete <br />or bituminous mixes and index or strength tests on soil for geotechnical design purposes. <br />NTI also has the equipment to perform compression tests of concrete cylinders, mortar, concrete block <br />and brick products as well as coring equipment to obtain concrete and bituminous cores. NTI has <br />performed mix designs for light and heavy duty pavements constructed of concrete, asphalt or <br />aggregate surfaces. We also test bituminous mixtures for quality and density, including stability, oil <br />content, air voids and density. Some of the tests we routinely perform in the lab include: <br />Soils & Aggregates <br />Proctors <br />Atterberg Limits <br />Mechanical Analysis <br />Sieves / Hydrometer <br />Organic Content <br />Moisture Content <br />Specific Gravity <br />Bituminous <br />Bituminous Extraction <br />Gradation <br />Marshall Densities <br />Bituminous Mix Designs <br />Rice's Specific Gravity <br />Stability and Flow <br />Minneapolis • Fargo • Grand Forks <br />Concrete, Masonry, & Grout <br />Concrete Cylinder Compression Testing <br />CMU Compression and Properties <br />Prism Compressive Strength <br />Grout Cube Testing <br />Concrete Mix Design <br />Mortar Mixture Properties <br />Cement /Aggregate Ratio <br />