【導(dǎo)讀】AmendmentsNos.Definitions,requirements,conformity,".May2020.

　　

【正文】 is standard will be met over the whole range. Trial tests should be carried out with the materials to be used on site to find the dosage necessary to achieve the required result. maximum remended dosage upper limit of the remended range of dosage reference concrete and mortar concrete and mortar as specified in EN 4801 for testing admixtures for conformity with this standard multifunction admixture admixture which affects several properties of fresh and/or hardened concrete by performing more than one of the main functions defined in to primary function a single function of a multifunction admixture designated by the manufacturer EN 9342:2020 (E) 7 secondary function a function of a multifunction admixture which is additional to the primary function Specific definitions admixtures for concrete material added during the mixing process of concrete in a quantity not more than 5 % by mass of the cement content of the concrete, to modify the properties of the mix in the fresh and /or hardened state water reducing/plasticizing admixture admixture which without affecting the consistence, permits a reduction in the water content of a given concrete mix, or which, without affecting the water content increases the slump/flow or produces both effects simultaneously high range water reducing/superplasticizing admixture admixture which, without affecting the consistence, permits a high reduction in the water content of a given concrete mix, or which, without affecting the water content increases the slump/flow considerably, or produces both effects simultaneously water retaining admixture admixture which reduces the loss of water by a reduction of bleeding air entraining admixture admixture which allows a controlled quantitiy of small, uniformly distributed air bubbles to be incorporated during mixing which remain after hardening set accelerating admixture admixture which decreases the time to mencement of transition of the mix from the plastic to the rigid state hardening accelerating admixture admixture which increases the rate of development of early strength in the concrete, with or without affecting the setting time set retarding admixture admixture which extends the time to mencement of transition of the mix from the plastic to the rigid state water resisting admixture admixture which reduces the capillary absorption of hardened concrete EN 9342:2020 (E) 8 set retarding/water reducing/plasticizing admixture admixture which produces the bined effects of a water reducing/plasticizing admixture (primary function) and a set retarding admixture (secondary function) set retarding/high range water reducing/superplasticizing admixture admixture which produces the bined effects of a high range water reducing/superplasticizing admixture (primary function) and a set retarding admixture (secondary function) set accelerating/water reducing/plasticizing admixture admixture which produces the bined effects of a water reducing/plasticizing admixture (primary function) and a set accelerating admixture (secondary function) 4 Requirements General requirements The requirements in this standard assume that admixtures are uniformly dispersed in concrete。 special attention shall be given to the dispersion of powder admixtures with retarding effects. All the admixtures defined in this standard shall conform to the general requirements in Table 1. NOTE For requirements which lead to the CEmarking, see Table of annex ZA Requirements for specific types of admixtures The admixtures defined in to shall conform to the corresponding performance requirements as follows: Water reducing/plasticizing admixtures Table 2 High range water reducing/superplasticizing admixtures Tables and Water retaining admixtures Table 4 Air entraining admixtures Table 5 Set accelerating admixtures Table 6 Hardening accelerating admixtures Table 7 Set retarding admixtures Table 8 Water resisting admixtures Table 9 Set retarding/water reducing/plasticizing admixtures Table 10 Set retarding/high range water reducing/ Table and Table superplasticizing admixtures Set accelerating/water reducing/plasticizing Table 12 admixtures Where manufacturer39。s stated values are required, this shall be provided in writing on request. Note deleted$ EN 9342:2020 (E) 9 Table 1 – General Requirements No Property Test method Requirements 1 Homogeneitya Visual Homogeneous when used. Segregation shall not exceed the limit stated by the ma nufacturer 2 Coloura Visual Uniform and similar to the description provi ded by the manufacturer 3 Effective ponenta EN 4806b IR spectra to show no significant change with respect to the effective ponent when pared to reference spectrum pro vided by the manufacturer 4 Relative densitya (for liquids only) ISO 758i$ D 177。 0,03 if D 1,10 D 177。 0,02 if D ≤ 1,10 where D is manufacturer39。s stated value 5 Conventional dry material contenta EN 4808c 0,95 T ≤ X 1,05 T for T ≥ 20 % 0,90 T ≤ X 1,10 T for T 20 % T is manufacturer39。s stated value % by mass。 X is test result % by mass 6 pH valuea ISO 4316 Manufacturer39。s stated value 177。1 or within manufacturer39。s stated range 7 Total chlorinea d ISO 1158e Either ≤ 0,10 % by ma ss or not above the manufacturer39。s stated value 8 Water soluble chloride (Cl)a EN 48010 Either ≤ 0,10 % by ma ssh or not above the