SANS 10120-5 GB-1984 Code of practice for use with standardized specifications for civil engineering construction and contract documents Part 5 Contract administration Section GB C.pdf

1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA

2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any

3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. SABS 0120 : Part 5 Section GB-1984 Concrete (ordinary buildings) PART 5 : CONTRACT ADMINISTRATION SECTION GB CONTENTS Pave Number STARTOFCONSTRUCTION . l

4、 (.herd . 1 1MMEDIATEI.Y AFIEK TIE HANDING OVER OF THE SITE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 General . l Approval of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . l Approval of Shorter St

5、ripping Penocl . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Notlce of Dates and Times of Placlng Concretc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 DURINGC(NSTKUCT1ON . l Methods of Construction .

6、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 General . 1 Preparation of foniwok . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Batchinghyvolurue 1 Con

7、lpaction l Placing concrete under adverse hot weather conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Unformecl concrete surface (screedecl finish) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 approval 1 Stnipling

8、for tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 QUALITY CONTROL AND OTHER CONSI1)EKATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 QuahtyControl . 2 IZlsputes, Mediations, Arhtnti

9、ons and Court Cases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Novrmhr 1984 Apploved by the COUNCIL OF THE SOUTH AFRICAN BUREAU OF STANDARDS ISBN 0-626.07163-1 SABS 0120: Part 5 Section GB-1984 Concrete (ordinaq buildings) SABS 1200 GB : CONCKETE (ORDINARY BUlLUI

10、NGS) NOTE: The clause numher(s) given at the beginning or after the heading of a clauuse isfare, unless otherwise stated, the number(s) of the relevant clause(s) of SABS 1200 GB. START OF CONSTRUCTION (XNEKII.,. For the purposes ofthis pat ofk code, cmct culminislration st.arts with instmctions to t

11、he contri1ctor to commence work as set out in Suhdause 4.1 of Section 0. IhlMEDIATELY AFTER THE I-IANL)IN(i OVER OF lt-I SITE GENERAI The engmer ShrId scpply the data, and the contractor the samples, as set out in Subdauses 2.1 and 2.2 of Sectlon G, as applicable, and in 2.2 below. APPROVAL OF MATER

12、IALS (Subclause 3 1) In older to avod delays, where pnor approval of aggegates and, when apphccihle, water, 1s lequlred, the engineer should ndcate the date by whch he must recewe samples for appmval. A tune of recelpt 7 d before the date on whch olders m to be placed 1s sufficiently early for aggre

13、gates that comply wrth the requuements of SABS 1083) but may be far too late fo those that do not comply and those that have u PLACING CONCRETE (Sulxlause 52.5.1). The coutindor and the engineer should agree on an acceptable time for plaeng concrete or on an amlgemenl for the provlslon of the notlce

14、 of the contractors mtenUon to place conclete m teims of Subclause 5.3.5.1 of SABS 1200 GB. DURING CONSTKUCTION METHODS OF CONSTKUCTION Cieierrll. Consideration should be given to such of the matters set out B Subclauses 3.2.1-3.2.2.4 of Section G as are applicable. prenaation of Forniwork (Subclaus

15、e 5.2.1,). Pormwork joints may be sealed by means of soaked paper-mnchb or putty. Batchm bv Volume (Subclause 5.3 2). Where balchuig IS by volume. cement should nonetheks be added m full sack umts, and qumtltles tor batches cmanged accordulgly. Suitable measuring (batchmg) boxeb of known volume shou

16、ld be filled wthout tampmg. mnurnng or coxhlatmnof any kud, other than that occunng naturally durmg the filhng process, and the cement should be struck off level wth the topmost edges. A1y adjustment of the volume should be made by means of supplementay contamers of a sultable sm. Adjtmellt by the m

17、mmplete filllog of the batchmg boxe to maks on their lnsde faces should not be pernntted. Conlndctmj (SuIx:lauses 5.3.6.1 and 5.3.6.2). Provlded that the concrete has a reasonable slump, efficent spadmg, roddlng or forkmg cm pmiuce mmte Ulltt 1s decluately compacted aml acheves the sprcfied strength

18、. Unless the engu1eer has approved the use of hand niethods and is sattsfied wth the deaee of compacton achieved, dlsputes In egard to paynlent may ulse. Cnpxhcn by mechuncal meaa n gemmlly more rehable and, d nechmucal vlbdon 1s scheduled, no disputes m regard to payment can anse dvlbrator me used

19、Placinv Concrete under Adve,rse Ilot Weather Conditions (Subclause 5.3.9.2). When concrete is placed under adverse hot weather conditions, stockpiles of aggregate.s and all metal surfaces in contact with aggregates snd with concrete should be shielded from the direct rays oftk sun or ccxled by heulg

20、 sprayed with water, and windhreLaks should be erected, if necessary, to prevent the initial rapid drying-out oC concrete which would otherwise occur before. normal curing procedures could be underfaken Unformed Conciete Surface &.reed RnisM (Subclause 5.3 10) Irnnledately after concrete has been pl

21、aced and compacted, the top sultace shtNlld he screeded off wlh a template tu tht: deugnated grLides Thls surfxe ,hould be tamped with a tanlpuig board to conlppact the surface thomghly, to Lmng mortar to the surface and to leave the surface shghtly ndged but generally at the requued elevation No mi

22、tar huld be added. Notrceal,le suface uegulantles caused by the displxement of coarse aggregate should be made good by re- screedlng after the mterfemg aggregate h,ts been removed or tamped ADMINISTKATION Appn,v+&. The coninclor aid ttr: engineer should ensure that action has been taken on the matte

23、rs referred to m 2.3 and 2.4 above and in 3.2.2 below, where applicable. Samplu for Tests. Forthe purposes of lahg samples aid cartyylng oul tests, the engineer should have free access to the work and the cornactor should render any assistance necessary. If so reclured, the contractor should provide

24、 storage and protectmn for samples on the site. In addition, the contractor should provide slump cones and the moulds for compressive strength testing in accordance with the requirements of SABS Method 863, in sufficient quantirrcs to enable the frequency of sampling and testing required in terms of

25、 Subclauses 7.1 and 7.2 of SABS l200 GB to be achieved. S& of samples taken in accordance with SABS Method 861 should be taken as soon a4 1s practmble after the start of placing and at appropriate mtervals after that, or from one pnrtcular batch and then from subsequent batches at appropriate interv

26、als. 1) Aggregates from natural sources. SABS 0120: Part 5 Section GB- 984 Concrete (orthnary bulldmgs) 4. QUALITY CONTROL AND OlfiBIZ C( )NSII)ERATIONS 4.1 QUNJTY CONTROL. Conlmcls for tthc type of conctnicton coveled by SABS 1200 (313 art. not norndly sulqect to quallty control rcquuemnts. 4.2 DISPUTES, MEUIATIONS, ARIIITDtASLONS ANI) COURT CASES. See 3.1.4 ,hovu ISUN 0-626-07163-1