Method for analysing the quantity of clay in a sand
AssigneeChryso
InventorsChristophe Derly, Antoine Colas
Life of this patent
Estimating the term…
Abstract
Disclosed is use of a compound of formula (I) to determine the quantity of clay in a sand and/or to determine the amount of CMA compound to be added to a hydraulic binder composition using a sand: R1—(OA)n—XR2 (I) where: R1 is a linear or branched C1 to C4 alkyl groups, or a coloured compound; R2 is a coloured compound; A, each the same or different, are independently a —CH2—CH2— group or —CH(CH3)—CH2— group; n is an integer of between 1 and 500, preferably between 4 and 250; and X is O or NH.
Claims15
A method for determining the concentration of superplasticizer-intercalating clays in a sand, comprising:
- a) providing a composition (C) comprising a compound of formula (I) R1μ—(OA)n—XR2 (I)
- where:
- R1 is a linear or branched C1 to C4 alkyl group, or a coloured subunit;
- R2 is a coloured subunit;
- A, each the same or different, is independently —CH2—CH2— or —CH(CH3)—CH2—;
- n is an integer of between 1 and 500;
- and
- X is O or NH;
- b) taking a sample of the sand to be analysed;
- c) mixing composition (C) with the sample of the sand in a container and agitating, to obtain a mixture;
- d) filtering the mixture obtained at step c), to obtain a solution;
- and
- e) determining the concentration of superplasticizer-intercalating clays in the sand as a function of the colour of the solution obtained at step d).
A method for determining an amount of clay mitigation agent (CMA) to be added to a sand for use in a hydraulic binder composition, comprising:
- i) providing a composition (C);
- ii) taking a sample of the sand;
- iii) mixing the composition (C) with the sample of the sand in a container and agitating, to obtain a mixture;
- iv) filtering the mixture obtained at step iii), to obtain a solution;
- and
- v) determining the amount of CMA to be added as a function of the colour of the solution obtained at step iv);
- wherein composition (C) comprises a compound of formula (I) R1—(OA)n—XR2 (I)
- where:
- R1 is a linear or branched C1 to C4 alkyl group, or a coloured subunit;
- R2 is a coloured subunit;
- A, each the same or different, is independently —CH2—CH2— or −CH(CH3)—CH2—;
- n is an integer of between 1 and 500;
- and
- X is O or NH.
Dependencies are inferred from the claim text.