摘要:
Method to artificially agglomerate finely divided materials. A method to agglomerate finely divided material into aggregates, the aggregates being larger than the finely divided material, comprising the steps of (a) mixing finely divided material, binder and water in a mixer, (b) adding an agglomerating agent to the mix formed in step (a) and mixing constantly. Finely divided material is selected from the group consisting of cement, sand, clay, glass, slag, fly ash, stone powder, bypass dust, limestone, silica fume, crushed brick, brick powder and crushed stone or a combination thereof.
摘要:
Die Erfindung betrifft eine Verzögerermischung umfassend Natriumgluconat und Alkalihydrogencarbonat, ein alkaliaktiviertes Bindemittel enthaltend Natriumgluconat und Alkalihydrogencarbonat, sowie ein Verfahren zur Einstellung der Festigkeitsentwicklung, bei dem Natriumgluconat und Alkalihydrogencarbonat einem alkaliaktivierten Bindemittel zugesetzt werden.
摘要:
Compositions and methods of the present invention comprise the use of at least one alkoxylated fatty compound comprising at least one propylene oxide group, the alkoxylated fatty compound having a turbidity most preferably greater than 1000 NTU (as measured in a 0.2 weight percent aqueous solution) and carbon dispersing compound (e.g., lignosulfonate) to reduce carbon spotting in mortars and concretes containing a carbon-bearing fly ash having a methylene blue (MB) value of at least 1 mg/g or greater (as 10 determined according to ASTM C1777-13). The compositions may, for example, be combined as dry powder with the carbon-bearing fly ash where the fly ash is produced, or in aqueous liquid composition form, such as would be suitable for dispensing at a concrete ready-mix plant. Exemplary additive or admixture compositions may further comprise air entraining agents, alkanolamines, or both.
摘要:
Process for the preparation of cement / mortar / concrete compositions or systems, (for simplicity hereafter "cement" compositions or systems or even "cements" ), of a generally known type containing low or medium (standard) "filler(s)", and/or optionally HP filler(s), as carbonate - based filler(s), namely coarse low or medium calcium carbonate(s), namely coarse marble(s); Product comprising, or consisting of, the pre - blend (A) of coarse, low or medium (or optionally HP) "calcium carbonate - based filler" pre-blended with at least an UF; Aqueous compositions (B) obtained by mixing the above pre- blend (A) of coarse filler(s) with UF(s) with an aqueous system such as mix water, aqueous mix fluid; Product (C) consisting of, or comprising,the pre-blend (A) or the compositions (B), treated or pretreated with at least one superplastifier or aqueous system containing superplastifier(s); Cement and Use of cement.
摘要:
The invention encompasses an ultrafine NFS powder wherein the particle size is sufficiently small as to increase the proportion of the reactive glassy silicate phase in the NFS, methods of making the ultrafine NFS powder, and cementitious products which use the ultrafine NFS powder. The invention also encompasses pozzolanic binders produced by fine grinding non-ferrous smelter slags, as well as methods for processing the non-ferrous slags wherein various chemical additives, such as pH increasing additives, are added to the binders to increase the strength of compositions for uses such as mine backfill or grout mixtures.
摘要:
Effective use of dispersants in wallboard containing foam results from a method where stucco is mixed with a first dispersant and a first quantity of water to form a gypsum slurry. A soap is blended with a second dispersant and a second quantity of water to make a foam. Subsequently, the foam is combined with the slurry. Choice of different first and second dispersants and their relative amounts allows control of the size distribution of the foam bubbles in the slurry and the resulting voids in the gypsum core. Melamine sulfonate condensate and polycarboxylate dispersants are preferred dispersants.
摘要:
A grout composition comprising at least a bond, a peculiarity of which consists in its comprising at least an inorganic antibacterial agent destined to be dissolved in the bond.
摘要:
A panel is provided that includes stucco, water and a dispersant component having dispersing properties and comprising a comb-branched polymer with polyether side chains, naphthalene sulfonate-formaldehyde condensate or melamine sulfonate-formaldehyde condensate. A polycondensation component is also included in the slurry that includes three repeating units. A method of making the gypsum panel includes combining stucco, water and a first dosage of a first dispersant to form a slurry, the first. A second dosage of a second dispersant is added to the slurry. Properties of the gypsum slurry are tested and it is formed into a product. The product sets and properties of the product are identified. The first dosage or the second dosage is changed based on the properties of the slurry or product.
摘要:
To provide shrinkage reducing agents which render excellent shrinkage reducing effect and frost-thaw resistance to cement compositions such as mortar and concrete without entraining excessive air, and exhibit excellent solution stability. The shrinkage reducing agent comprises a (poly)alkylene compound having an unsaturated bond represented by the formula (1 ): R 2 O-R 1 -O-(A 1 O) n -R 3 (1 ) -(A 2 O) m -R 4 (2) (wherein R 1 is a C 2-10 hydrocarbon group having an unsaturated bond; R 2 is hydrogen or the formula (2); R 3 and R 4 are each independently hydrogen or a C 1-8 alkyl group; A 1 O and A 2 O are one or more kinds of C 2-4 oxyalkylene groups; and n and m are mean addition numbers of moles Of A 1 O and A 2 O, respectively, and 1 to 20).