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1、BRITISH STANDARD BS 5911-114: 1992 Precast concrete pipes, fittings and ancillary products Part 114: Specification for porous pipes Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:37:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5911-114:1992 This British Standard, having been prepared
2、under the direction of the Cement, Gypsum, Aggregates and Quarry Products Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 November 1992 BSI 02-1999 The following BSI references relate to the work on this standard: Committee reference C
3、AB/12 Draft for comment 90/11577 DC ISBN 0 580 19993 2 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Cement, Gypsum, Aggregates and Quarry Products Standards Policy Committee (CAB/-) to Technical Committee CAB/12, upon which the follow
4、ing bodies were represented: Association of Consulting Engineers Association of Metropolitan Authorities British Cement Association British Precast Concrete Federation Ltd. Concrete Pipe Association Concrete Society County Surveyors Society Department of Transport Federation of Civil Engineering Con
5、tractors Institution of Civil Engineers Institution of Highways and Transportation Institution of Water and Environmental Management Ministry of Agriculture, Fisheries and Food Pipe Jacking Association Sand and Gravel Association Limited Water Services Association of England and Wales The following
6、body was also represented in the drafting of the standard, through subcommittees and panels: Department of Transport Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:37:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5911-114:1992 BS
7、I 02-1999i Contents Page Committees responsibleInside front cover Forewordii Section 1. General 1Scope1 2Definitions1 Section 2. Materials 3Cement2 4Aggregates2 5Other concrete materials2 6Concrete2 Section 3. Dimensions and tolerances 7Nominal size (DN)3 8Effective length of pipes3 9Diameters3 10Va
8、riation in the thickness of wall3 11Deviation from straightness3 12Joints3 13Non-porous inverts3 Section 4. Tests 14General4 15Test requirements4 Section 5. Inspection procedures and marking 16Type of inspection and batch size5 17Inspection procedures6 18Marking6 Appendix A Information to be supplie
9、d in an enquiry and order8 Appendix B Method of assessment of deviation from straightness8 Appendix C Method of carrying out infiltration test9 Appendix D Crushing load tests for pipes9 Appendix E Facilities for purchasers11 Figure 1 Typical joints1 Figure 2 Effective length of units1 Figure 3 Non-p
10、orous invert3 Figure 4 Gauge for assessing deviation from straightness8 Figure 5 An arrangement for a porous pipe testing apparatus9 Figure 6 Testing arrangement for the crushing test11 Table 1 Nominal sizes and tolerances3 Table 2 Infiltration rates and crushing loads4 Table 3 Summary of test requi
11、rements and inspection procedures4 Table 4 Maximum number of individual defectives in last 10 batches permitted for switching to reduced inspection (crushing load test)5 Table 5 Inspection plans for crushing load tests6 Publication(s) referred toInside back cover Licensed Copy: sheffieldun sheffield
12、un, na, Fri Dec 01 14:37:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5911-114:1992 ii BSI 02-1999 Foreword This Part of BS 5911 has been prepared under the direction of the Cement, Gypsum, Aggregates and Quarry Products Standards Policy Committee. It supersedes BS 1194:1969 which is withdrawn.
13、In carrying out the revision the opportunity has been taken to integrate the new standard with the BS 5911 series and to align the contents wherever appropriate with BS 5911-100. Compared with BS 1194, which has remained untouched since its publication in 1969, the revision is fully metricated and i
14、ncorporates an inspection system based on BS 6001-1:1991 for controlling production batches. Product certification. Users of this British Standard are advised to consider the desirability of third party certification of product conformity with this British Standard based on testing and continuing su
15、rveillance, which may be coupled with assessment of a suppliers quality systems against the appropriate Part of BS 5750. Enquiries as to the availability of third party certification schemes will be forwarded by BSI to the Association of Certification Bodies. If a third party certification scheme do
16、es not already exist, users should consider approaching an appropriate body from the list of Association members. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a Bri
17、tish Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 12, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendment
18、s incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:37:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5911-114:1992 BSI 02-19991 Section 1. General 1 Scope This Part of BS 5911 specifies requirements for
19、 unreinforced porous concrete pipes which are intended to admit water through the pipe wall throughout their full length and full circumference or, in the case of pipes with non-porous inverts, throughout part of their circumference. Porosity of the joint is not a requirement. The specification cove
20、rs constituent materials, dimensional requirements, performance requirements, appropriate test methods and inspection procedures. Combinations of special cements have not been included in this standard in the absence of experience with them in this context. NOTEThe titles of the publications referre
21、d to in this standard are listed on the inside back cover. 2 Definitions For the purposes of this Part of BS 5911 the following definitions apply. 2.1 porous pipe a hollow cylinder manufactured from unreinforced porous concrete, of uniform internal diameter and cross section throughout its length, e
22、xcept at the joint profile NOTEWhen “pipe” is used alone in this standard this indicates a porous pipe. 2.2 barrel that portion of a pipe throughout which the internal diameter and cross section remain substantially uniform 2.3 rebated joint a joint made within the wall thickness of a pipe, includin
23、g ogee joints NOTESee Figure 1. 2.4 nominal size (DN) a numerical designation of the bore of a pipe, which is a convenient round number approximately equal to the internal diameter in millimetres 2.5 manufacturing diameter a diameter of a pipe that a manufacturer seeks to achieve 2.6 actual internal
24、 diameter an internal diameter found by measurement 2.7 effective length the length of a pipe measured as shown in Figure 2 2.8 batch the number of pipes of a particular specification produced under uniform conditions during a given production period by one particular process Figure 2 Effective leng
25、th of units Figure 1 Typical joints Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:37:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5911-114:1992 2 BSI 02-1999 Section 2. Materials 3 Cement The cement shall be factory-produced by the cement manufacturer and comply with one of the follo
26、wing standards as appropriate: 4 Aggregates 4.1 General Aggregates shall consist of either: a) materials complying with BS 882:1983 except that the manufacturer may modify the grading requirements of clause 5 of that standard (see clause 0 of BS 882:1983); or b) lightweight aggregate complying with
27、BS 3797. 4.2 Testing 4.2.1 Mechanical properties The limiting values on the mechanical properties of coarse aggregates shall be either a minimum 10 % fines value of 100 kN or a maximum aggregate impact value of 30 %. Aggregates complying with BS 3797-2 shall have values of 10 % fines, aggregate impa
28、ct and chloride ion content which are consistent with the relevant provisions of BS 882. 4.2.2 Nominal maximum size The nominal maximum size of aggregate shall not exceed the least of the following: a) 20 mm; b) one quarter of the wall thickness. 5 Other concrete materials 5.1 Water Water shall be c
29、lean and free from harmful matter in such quantities as would affect the properties of the concrete in either the plastic or the hardened state (see Appendix A of BS 3148:1980). NOTEAs a general rule, potable water, whether treated for distribution through the public supply or untreated, is suitable
30、 for marking concrete. 5.2 Admixtures Admixtures shall comply with BS 5075. NOTEAdmixtures, when used (see Appendix A), should not impair the durability of the concrete, nor combine with the ingredients to form harmful compounds. The chloride ion content of admixtures shall not exceed 2 % by mass of
31、 the admixture or 0.03 % by mass of the cement, when used in any concrete made with cement complying with BS 4027. The manufacturer shall make available details of: a) the relevant production records; b) the admixture(s) used; c) the dosage rate of each admixture; d) the effect of under-dosing and o
32、ver-dosing. 6 Concrete 6.1 Work in cold weather Concrete, when placed, shall have a temperature of at least 5 C, which shall be maintained until the concrete is hardened. It is permissible to heat aggregates and water before mixing to a temperature not exceeding 60 C. Other materials and moulds, if
33、at a temperature below 0 C, shall not be used. Type of cementStandard to be complied with ordinary and rapid-hardening PortlandBS 12 Portland-blastfurnaceBS 146 sulfate-resisting PortlandBS 4027 Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:37:26 GMT+00:00 2006, Uncontrolled Copy, (c) BS
34、I BS 5911-114:1992 BSI 02-19993 Section 3. Dimensions and tolerances 7 Nominal size (DN) The nominal sizes (see 2.4) of pipes shall be those given in Table 1. 8 Effective length of pipes The effective length of pipes, see (2.7), shall be in the range 0.45 m to 1.25 m inclusive. Information shall be
35、available on the effective lengths of pipes in a given nominal size named in an enquiry or order (see Appendix A). 9 Diameters 9.1 Internal manufacturing diameter and actual diameter Information shall be available at the enquiry stage on the internal manufacturing diameters (see 2.5) that can be sup
36、plied (see Appendix A). The internal manufacturing diameter shall not be outside the limits given in column 2 of Table 1. The actual internal diameter (see 2.6) shall not deviate from the manufacturing diameter by an amount greater than that given in column 3 of Table 1. 9.2 External manufacturing d
37、iameter The external manufacturing diameter of the barrel of the pipe (see 2.2) shall be declared if required. (See Appendix A.) 10 Variation in the thickness of wall The radial thickness of the wall of a pipe shall not vary by more than the amount stated in column 4 of Table 1. 11 Deviation from st
38、raightness When assessed as described in Appendix B, the pipe shall satisfy the criteria for straightness. 12 Joints The axial length of each joint of a pipe shall be not less than 15 mm or (0.03 DN + 7) mm, where DN is the nominal size of the pipe, whichever is the greater. For example, for a secti
39、on of DN 600, the axial length shall be not less than (0.03600 + 7) mm = 25 mm. Other joint dimensions shall conform to the manufacturers stated dimensions and tolerances. NOTEFor typical joints see Figure 1. 13 Non-porous inverts When specified (see Appendix A) a non-porous invert shall extend for
40、the full length of the pipe and to a height up the pipe equal to not less than one-third of the internal diameter (D) measured from the invert of the pipe as intended to be laid (see Figure 3). Table 1 Nominal sizes and tolerances NOTEThe treatment of the invert is not intended totally to seal the w
41、all of the pipe. The pipe may be made non-porous by treating either the inside or outside of the pipe. Figure 3 Non-porous invert 1234 Nominal size of pipesPermissible limits of internal manufacturing diameter (see clause 9) Permissible deviation of actual internal diameter from manufacturing diamet
42、er (see clause 9) Variation of wall thickness (see clause 10) Maximum diameter Minimum diameter DNmmmmmm ()mm 10010510056 15015515056 22523022556 30030530056 37538536566 45046044066 52553551566 60061059066 75077073066 90092088066 Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:37:26 GMT+00
43、:00 2006, Uncontrolled Copy, (c) BSI BS 5911-114:1992 4 BSI 02-1999 Section 4. Tests 14 General 14.1 Routine and type testing 14.1.1 Pipes shall comply with the appropriate routine and type test requirements given in this section and summarized in Table 3 and shall be inspected using the procedures
44、specified in section 5. NOTEInspection procedures are not given in this Part for isolated batches of units subject to the hydrostatic or works proof load crushing test. 14.1.2 Type tests shall be carried out to prove the design of a pipe. They shall be undertaken wherever there is a change in design
45、, type of material or method of manufacture. 14.1.3 Records of all tests and inspection procedures shall be kept by the manufacturer. 14.2 Acceptance of pipes Pipes shall be considered ready for acceptance only after the design has been proven by type tests and the batch of which the pipes form part
46、 has been routinely tested and shown to comply with clause 16. All pipes within any batch shall be cured and matured under similar conditions. They shall not be despatched until they are at least 10 days old. 15 Test requirements 15.1 Crushing load test When tested in accordance with Appendix D, a p
47、ipe shall support, for 1 min, the load specified in Table 2 without any sign of failure. NOTECube tests for the concrete used in pipes and built-up bends and junctions are not required because the concrete used in the manufacture of these units is generally compacted in quite a different way from th
48、e method specified in BS 1881-5. Table 2 Infiltration rates and crushing loads 15.2 Infiltration test When tested in accordance with Appendix C, porous pipes shall have an average rate of infiltration of not less than the values shown in Table 2, column 2. Any individual result shall be not less tha
49、n half the stated infiltration rate. The rate of infiltration for porous pipes with non-porous inverts shall be ascertained before the invert is treated. Table 3 Summary of test requirements and inspection procedures Nominal size Infiltration rateCrushing load (minimum) Class 1Class 2 DNl/min/mkN/mkN/m 1006520 15010020 22515020 30020020 37525020 4502502023 5252502025 6002502027 7502502030 9002502030 UnitNominal size and category TestCompliance requirements given in clause Test method given in Required as type test (see 14.1.1) Requ