Section 5-Part 4-Water
Section 5-Part 4-Water
Section 5-Part 4-Water
4 WATER
4.1 GENERAL
4.1.1 Scope
1 This Part includes water used for concrete mixtures, washing of aggregates and equipment, wetting
of surfaces or ponding during curing or for wetting formwork and washing reinforcement.
2 Related Sections and Parts are as follows:
This Section
Part 2,.............. Aggregates
Part 6,.............. Property Requirements
Part 9,.............. Formwork
Part 10,............ Curing
Part 11,............ Reinforcement
4.1.2 References
1 The following standards are referred to in this Part:
ASTM C109................test Method for Compressive Strength of Hydraulic Cement Mortars (using
2-in or 50 mm Cube Specimens)
BS 1377......................Methods of test for soils for civil engineering purposes.
BS 2690......................Methods of testing water used in industry
BS 6068......................Water quality
BS EN ISO 9963-1 .....Determination of total and composite alkalinity
BS EN ISO 9963-2 .....Determination of carbonate alkalinity
EN 196-1 ....................Determination of strength
EN 196-2 ....................Methods of testing cement - Part 2: Chemical analysis of cement
EN 196-3 ....................Determination of setting time and soundness
EN 1008 .....................Mixing water for concrete, Specification for sampling, testing and assessing
the suitability of water, including water recovered from processes in the concrete industry, as
mixing water for concrete
SM 5220 B ................. Chemical Oxygen Demand (COD)
SM 4500 ....................Standard Methods for the Examination of Water and Wastewater
ISO 7890 ...............Water quality -- Determination of nitrate -- Part 1: 2,6-Dimethylphenol
spectrometric method
SM 3125B (ICP/MS)...Metals by Inductively Coupled Plasma/Mass Spectrometry
4.2.1 General
1 Potable water is suitable for use in concrete, while water of other origin such as underground water,
natural surface water, recovered water, as well as municipal treated water or mixed water shall be
tested to prove that its quality shall conform to water quality requirements as given below in 4.3.
2 On site, where a permit is issued for Municipal Treated Effluent use for concrete, the effluent shall
be treated by tertiary treatment stage: Reverse Osmosis (R.O.), and disinfection (Ultraviolet
Radiation, or ozonation).
3 The water shall be examined in accordance with the test procedures stated in Table 1, EN
1008. Water not conforming to one or more of the requirements in Table 1, EN 1008 may be used
only, if it can be shown to be suitable for use in concrete, in accordance with the physical tests of
Table 1 below.
4 The site health and safety services and Treated Effluent Quality shall fulfil the requirements of 5
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4.2.2 PH of Water
1 The pH of water used in concrete works shall be as shown in Table 4.2.
Table 4.1
Acceptance Criteria and Physical Tests for Mixing Water
Test Method Limits
Setting time, max. deviation from control, (h:min) EN 196-3 from 1:00 early to 1:30 later
Table 4.2
Chemical Limitations for Mixing Water
Maximum Limit,
Parameter Test Method mg/l
(a) Chloride (as CI) BS 6068-1.37 (ISO
9297)
(a-1) for Prestressed concrete. 500
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Table 4.3
Maximum limit of Harmful Contaminants
COD SM 5220 B 50
SM 4500 P B, C, SM 4500
Phosphate; expressed as PO4 - P 30
PD by subtraction
Nitrate; expressed as NO3 -N- ISO 7890-1 100
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(c) The site shall be facilitated by health and safety guidelines signs, where it is indicated by
Arabic, English, and any other languages where there are 5 workers or more on the site,
that “Water not for Human Consumption”
(d) The site shall be facilitated by health and safety equipment, as well as, personal health and
safety protection equipment.
(e) Labour shall follow health and safety guidelines and instructions and use their health and
safety personal protection equipment.
END OF PART
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