This document describes the analytical procedures used to determine the content of C3A in the clinker starting from a chemical analysis on cement. The method can be applied to CEM type I and IV for the determination of the requirement of C3A, as defined on EN 197 1. This document describes two methods, traditional wet and XRF analysis (EN 196 2), which can be considered to be equivalent, in the scope of this CEN\/TR 17365, for the determination of Al2O3, Fe2O3 and SO3. The same methods are described in EN 196 2, but for the scope of this document, the X-ray fluorescence (XRF) is the preferred method to be used for the determination of Al2O3, Fe2O3 and SO3.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 2<\/td>\n | National foreword <\/td>\n<\/tr>\n | ||||||
| 6<\/td>\n | European foreword <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | 1 Scope 2 Normative references 3 Terms and definitions 4 Principle of the method <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | 5 Expression of masses, volumes, factors and results 6 Ignitions 7 Determination of constant mass 8 Preparation of a test sample of cement <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 9 Reagents 9.2 EDTA – dihydrated disodium salt of ethylenediaminetetra-acetic acid. 9.3 0,025M EDTA solution 9.11 Hydrochloric acid, dilute (1 + 1) <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 9.12 Hydrochloric acid, dilute (1 + 100) 9.14 Sulfo-5-salicylic acid dehydrate 9.15 Sulphosalicylic acid indicator: 9.17 Acetic buffer solution at pH 4,7-4,8 9.20 buffer solution, ammoniacal 9.22 Potassium hydroxide solution 4N, 9.23 Methylthymol blue complexone indicator 9.24 Methyl orange indicator 9.26 Methylthymol blue mix complexone indicator 9.28 Copper complexonate solution <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 9.30 Murexide indicator 9.33 Reagent for determination of carbon dioxide 10 Apparatus 10.3 Electric furnace or Bunsen burner for temperatures up to 950 \u00b0C 10.4 Electromagnetic stirrer 10.6 Vacuum filtration device 10.10 Platinum crucibles, 10 to 20 cm3 capacity, with lids 10.11 Hot plate (or sand bath) capable of being set to temperatures up to 350\u00b0C. 10.12 Sand bath set to a temperature of 105 \u00b1 5\u00b0C (or bain-marie). <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 11 Determination of BCR residue on cement 11.1 Procedure <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 12 Decomposition of the test sample for CEM I and IV type cements 12.1 General 12.2 Precipitation of silica: treatment with perchloric acid in covered beaker <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 13 Decomposition of the BCR residue and precipitation of silica in the residue <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 14 Chemical analysis of the filtrate obtained from treatment of the test sample and of the filtrate obtained from treatment of the BCR residue 14.1 General 14.2 Determination of ironoxide (Fe2O3) 14.3 Determination of aluminium oxide (Al2O3) <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 15 Determination of Sulfur trioxide (SO3) 16 Volumetric determination of carbon dioxide (CO2) in the cement test sample <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 17 Chemical analysis by X-ray fluorescence 18 Calculation and expression of results 18.1 General 18.2 Calculation of the gypsum content 18.3 Calculation of the CaCO3 content 18.4 Calculation of the pozzolana content <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | 18.5 Calculation of the correction factor for cement types I 18.6 Calculation of the correction factor for cement types IV\/A and IV\/B 18.7 Calculation of the C3A, C4AF of clinker according to Bogue for cement types I: 18.8 Calculation of the C3A, C4AF of clinker according to Bogue for cement types IV\/A and IV\/B: 19 Repeatability and reproducibility <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Method for the determination of C3A in the clinker from cement analysis<\/b><\/p>\n |