COLTO Exclusion Clauses for Readymix

COLTO EXCLUSION CLAUSES

CONCRETE

The Ready-mix supplier agrees to supply concrete as defined in COLTO Standard Specification for Road and Bridge Works for State Road Authorities SERIES 6000: STRUCTURES, SECTION 6400: CONCRETE FOR STRUCTURES and SECTION 7100: CONCRETE PAVEMENTS subject to the following conditions:

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 the SANS Method 6085, the Ready-mix supplier reserves the right to define the accredited laboratory at which the tests are conducted. Mix designs will be approved based on the laboratory performance of the mixes and concrete supplied will be batched in accordance with these approved mixes.

Section 6404 (b) and Section 7103 (d) Strength concrete

A valid test result for a sample of concrete shall be the average of three cubes made, cured and tested in accordance with the relevant SANS test method, tested at a laboratory accredited for the test(s) and sampled in accordance with the truck sampling method defined in SANS 878.

Section 6404 (d) Consistence and workability

The test for consistence of freshly mixed concrete must be done in accordance with the relevant SANS test method and where applicable the ranges shall conform to the value(s) set in SANS 878: Section 13.2.


Section 6406 (f) Ready-mixed concrete

Since concrete supplied by the Ready-mix supplier must conform to the requirements laid out in SANS 878: Ready Mixed Concrete, only the acceptance criteria specified in section 14.4 and/or section 14.5.3 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 the Ready-mix supplier.

Section 6407 (a) Placing and compacting: General and Section 7105 (d) Transporting the concrete

Since concrete supplied by the Ready-mix supplier must conform to the requirements laid out in SANS 878: Ready Mixed Concrete, delivery and transportation must solely comply with the requirements as defined in section 9.8.1 of this standard.

Section 6410 (b) Hot weather

Since concrete supplied by the Ready-mix supplier must conform to the requirements laid out in SANS 878: Ready Mixed Concrete, during hot weather concreting the Ready-mix supplier must solely comply to the specifications set out in SANS 10100-2 :2014. The temperature(s) defined in Section 6400 Concrete for structures, 6410 Adverse weather (b) shall therefore not apply to the Ready-mix supplier.

Section 6414 (a) and Section 7124 (a) Quality control and workmanship

This section states that “The resubmission of concrete lots on the basis of cores for full or conditional acceptance shall not be allowed.” The Ready-mix supplier reserves the right to gain full or conditional acceptance based on core results, tested in accordance with SANS 5865 and analysed in accordance with SANS 10100:2 2014 section 14.4.3, in the event of a dispute related to in-situ concrete strength.

Section 7105 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 14.4 and/or section 14.5.3 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 the Ready-mix supplier.

General

Where there is a dispute regarding the in-situ strength of concrete supplied by the Ready-mix supplier, we reserve the right to only accept test results from a laboratory accredited for the test(s) in question.

This document was originally compiled by SARMA. As SARMA has recently disbanded, this document is now made available on the Go Consult website.