2015-158 - Laserfiche WebLink

Home Browse Search

Proposal for Materials Testing Services 87th Street and 91St Avenue Sidewalk Improvements • Indian River County, Florida Revised June 23, 2015 • Terracon Proposal No. PHB150099 B. SCOPE OF SERVICES Page 2 Based on our understanding of the review of the project plans and specifications, and our past experience, we envision that our field materials sampling/testing services will be required on a periodic basis over the duration of the project. We will provide qualified technicians on a per test unit rate basis. More specifically, our work will involve the following scope outlined below: Field Observation, Sampling & Testing • Earthwork Observations, if necessary, by an engineering technician during the site grading operation including the proof -rolling of "strip grade" for the embankment construction as requested by Indian River County. • Materials Sampling by an engineering technician and delivery to the laboratory for testing of the materials used for embankment, storm drainage backfill, and sidewalk/driveway subgrade. • In-place density testing will be performed during placement of the embankment fill for roadway embankment construction. The density tests will be performed at a frequency of approximately one (1) test for every 200 lineal feet of roadway/embankment within the proposed alignment, for each 1 -foot thickness of backfill placed. • In-place density testing during backfilling of storm drains and catch basins for each 1 - foot lift of backfill placed from the bottom of the structure up to an elevation corresponding to final grade. We have assumed the contractor will be utilizing "thick lift" placement. • In-place density testing during backfilling of the rigid and flexible pipelines. At each roadway or driveway crossing, density tests will be performed for each 6 -inch lift vertically of backfill placed starting at an elevation corresponding to the invert of the pipe and extending up to the final grade. • In-place density tests for the sidewalk and driveway subgrade prior to concrete placement. • Sampling, slump testing, molding, transporting, curing, and laboratory testing to determine the compressive strength of concrete placed during construction (sidewalk, driveways, and concrete endwall). Laboratory Testing • Perform laboratory moisture -density relationship (Proctor) tests (AASHTO T-180 and AASHTO T-99), organic content tests, and sieve analysis (percent fines for soil classification purposes) on the embankment fill and pipe backfill soils in accordance with FDOT specifications. • Limerock Bearing Ratio (LBR) tests, if required, for stabilized subgrade and base course beneath driveways or other select areas. • Concrete cylinder test specimens will be tested following ASTM C39 for their compressive strength at 7 days and 28 days after placement. DUNKELBERGER