SARMA'S proposal to its members is that this document is used to ensure that when entering into an agreement on a project that the fair supply of Quality Readymix Concrete is agreed to and no unfair demands or penalties are incurred by members.
SARMA members agree to supply concrete as defined in COLTO Standard Specification for Road and Bridge Works for State Road Authorities:
(i) SERIES 6000: STRUCTURES,
(ii) SECTION 6400: CONCRETE FOR STRUCTURES and
(iii) SECTION 7100: CONCRETE PAVEMENTS, subject to the following conditions:
2.1 Section 6402 (b) (3) and Section 7102 (c) (i) Drying shrinkage
Due to the proven repeatability and reproducibility problems related to concrete tested in accordance with SANS 6085: Concrete tests - Initial drying, shrinkage and wetting expansion of concrete. SARMA members reserve the right to agree upon the accredited laboratory at which the tests are to be conducted. Mix designs will be approved based on the laboratory performance of the mixes. Concrete will be batched in accordance with the accuracies prescribed in SANS 878: Readymixed Concrete and in accordance with the approved laboratory mixes.
(It should also be noted that SANRAL has removed this clause from their 6400 project specifications).
A valid test result for a sample of concrete shall be the average of three cubes sampled in accordance with the truck sampling method defined in SANS 878 and made, cured and tested by an accredited laboratory in accordance with the relevant SANS Test Methods.
Since concrete supplied by SARMA members must conform to the requirements laid out in SANS 878, only the acceptance criteria specified in section 14 of SANS 878 shall apply. The judgement plans defined in Series 8000: Sundries, Section 8200 Quality Control (scheme 1) and Section 8300 Quality Control (scheme 2) shall therefore not apply to SARMA members.
2.4 Section 6407 (a) Placing and compacting: General and Section 7105 (d) Transporting the concrete
Since concrete supplied by SARMA members must conform to the requirements laid out in SANS 878, only delivery times defined in section 9.8 of this standard will apply.
2.5 Section 6414 (a) and Section 7124 (a) Quality Control and Workmanship
This section states that "The re-submission of concrete lots on the basis of cores for full or conditional acceptance shall not be allowed". SARMA members reserve the right to gain full or conditional acceptance based on core results, tested in accordance with SANS 5865: Concrete tests - The drilling, preparation, and testing for compressive strength of cores taken from hardened concrete and analysed in accordance with SANS 10100-2: The structural use of concrete Part 2 : Materials and execution of work, section 14.4.3, in the event of a dispute related to in-situ concrete strength. Should the core results meet the acceptance criteria as set out in SANS 10100:2, full payment shall apply.
2.6 Batching, mixing and transporting concrete
Notwithstanding the requirements of this section, in the event of concrete being supplied for pavements, only the acceptance criteria specified in section 14 of SANS 878 shall apply. The judgement plans defined in Series 8000: Sundries, Section 8200 Quality Control (scheme 1) and Section 8300 Quality Control (scheme 2) shall therefore not apply to SARMA members.
Where there is a dispute regarding the in situ strength of concrete supplied by SARMA members, the members reserve the right to only accept test results from a laboratory accredited for the test in question.