85026Y0153 - Construction Materials Testing Services for Independent Assurance

2026-11-03

The Department of Design and Construction is looking to procure a vendor who can provide Construction Materials Testing Services for Independent Assurance . The work under this Contract will include but not be limited to : material sampling and testing ; pick up of material from and delivery to designated locations within the Boroughs of Staten Island , Manhattan , Queens , Brooklyn and Bronx , and vicinity , as directed by the DDC . The work will also include field evaluation of personnel , protocols and equipment used by materials testing companies performing work on DDC projects . All work must be done in accordance with the Section IV Technical Specifications for each item of work , as set forth inthe Specific Requirements . The specifications and standards listed under each Item must refer to the most current publication during the Contract term . TECHNICAL SPECIFICATIONS All Items : For all items listed below , requisitions for payment shall be submitted in accordance with Section I , Article 7 . 7 , of these Specific Requirements . Item No . 01 : Compressive Strength of Concrete Cylinders 1 . Referenced Documents The latest version of the following reference documents shall be applicable : • ASTM C31 ; ASTM C39 ; ASTM C511 ; ASTM C617 • NYCDOT Standard Highway Specifications 2 . Scope This test method presents procedures for transportation , curing , testing , and reporting of the compressive strength of 6 ” x 12 ” concrete specimens cast in the field . 3 . General Concrete cylinders are cast in the field by the REI or DDC Staff to determine the compressive strength of concrete where cored specimens are impossible or impractical . For every 50 cubic yards of concrete , a set of three cylinders shall be cast : one 7 - day and two 28 - day cylinders . Tests shall be performed per ASTM C39 or as otherwise directed . 4 . Equipment The Testing Laboratory operated by the TL shall include , but not be limited to , the following equipment : • Moist room or enclosure meeting the requirements of ASTM C511 . • Capping equipment as specified in ASTM C617 . • Testing Equipment as specified in ASTM C39 . The cost of procuring , operating , calibrating , and maintaining this equipment shall also be included in the bid price of this item . Records of maintenance and calibration shall be maintained in the Total Quality Management System ( TQMS ) manual , and available for inspection by DDC without prior notice . 5 . TL Curing of the Specimens Upon arrival of the cylinders at the TL , they shall be stored in a moist condition as specified in ASTM C31 . Moist storage shall be obtained by placing the specimens in a moist room or cabinet meeting the requirements of ASTM C511 . 6 . Compressive Strength Testing Cylinders must be tested as follows , unless otherwise instructed by the Director : • If the cylinders are received less than 28 days after their cast date , one must be tested at the earliest of 7 , 14 , 21 , or 28 days and the two remaining cylinders must be tested at 28 days . • If the cylinders are received more than 28 days after their cast date , all 3 must be tested by the following business day . • If the due date for the test falls on a Saturday , Sunday or DDC Holiday , the cylinder must be tested on the following business day . Prior to testing , the cylinders must be capped as required by ASTM C617 . Unbonded caps per ASTM C1231 may be used , if approved by the Director , and the TL maintains current AMRL accreditation for ASTM C1231 . If required , the TL must be required to cut or grind the cylinders so that they are in a condition to be capped , at no additional cost to the DDC . The compressive strength test must be performed in accordance with ASTM Test Method C39 . When the cylinder is tested after 28 days of casting , the provisions of NYCDOT Standard Highway Specifications , Table 3 . 05 - V must be used to determine the 28 - day strength of the concrete .

New York

2026-04-28