City of Lawrence
Location: Lawrence, Kansas
Client: City of Lawrence
Services: Construction Observation, Materials Testing
Geotechnology has provided construction observation and material testing services for the following municipal projects for the City of Lawrence under our existing multi-year on-call contract:
- 6th and Iowa Intersection
- 9th St, Emery to Michigan
- 23rd and Iowa Intersection
- 31st St. Extension, Haskell to O’Connell
- Bob Billings Parkway, Kasold to Crestline
- Bob Billings Parkway and Iowa Intersection
- Delaware and 9th
- Fairfield Farms
- Fox Chase
- Kentucky and 9th
- Landon Court
- Langston Heights
- Oregon Trail
- Rock Chalk Park
- Sycamore Street
- Tennessee and 9th
- Venture Park
- Wakarusa, Oread to Inverness
City of Lawrence Projects Background
Our quality assurance services for the referenced projects consisted of sampling and testing multiple materials. We tested fresh concrete, concrete aggregates, soils, aggregate base, and asphaltic concrete hot mix and cold feed samples. We performed these services in accordance with KDOT and the City of Lawrence Standard Specifications.
In addition to these services, Geotechnology provided concrete specification mix design verification testing services for the City. The project consisted of a two-part testing program. The first part included obtaining cored specimens of existing Portland cement concrete pavements (PCCP) at preselected locations within Lawrence. Compressive strength, hardened air content, unit weight, permeability, water cement ratio and alkali silica reactivity (ASR) detection testing was performed on the cored samples.
The second part of the testing program included obtaining raw materials from each of the local concrete producers to perform mix design verification testing. Fresh concrete tests performed for the mix design verification included, slump, air content, unit weight. Test specimens were cast to provide compressive and flexural strength test data, alkali silica reactivity (ASR) data, and for permeability testing.
The results of the tests were compared to the City’s concrete specifications, KDOT specifications and KCCMB specifications. Additionally, the City used this information to refine their specifications for future projects.