Abstract:
Methods for producing compositions that prevent, mitigate or delay the onset of corrosion of iron or steel (e.g., plain carbon steel) components used as reinforcement or otherwise at least partially embedded in carbonated concrete composite materials and objects based on carbonatable calcium silicate cement are disclosed.
Abstract:
The invention relates to processes for making improved ultra-high performance microfiber concrete and articles made from the same. The invention includes blending first dry constituents of fine aggregate, steel fiber, and cement to yield a first homogenous dry mix, optionally adding carbon nanotubes and/or silicon carbide microinclusions, followed by blending with second dry constituents of silica fume, silica flour, and cenospheres to obtain a second homogenous dry mix, followed by adding water only, with further blending, and finally adding a superplasticizer admix and a water-reducing admix to obtain ultra high performance microfiber concrete. The invention also relates to voltage heating for curing and for creating heated UHPC articles.
Abstract:
A green concrete comprising: a binder component comprising Portland cement (C), volcanic ash (VA), microsilica (MS) and colloidal nano-silica (CNS); an aggregate component comprising fine aggregates (FA) and coarse aggregates (CA); water (W); and a super plasticizer.
Abstract:
Calcium silicate-based cements and concretes are disclosed, which result in concrete compositions that have an improved strength development. A cement product includes a plurality of particles of a carbonatable calcium silicate cement and a first additive; wherein, the first additive is an organic molecule with at least one primary, secondary or tertiary amine group.
Abstract:
A hydraulic binder includes, as percentage by mass: from 17 to 55% of a Portland cement, the particles of which have a D50 of from 2 μm to 11 μm; at least 5% of silica fume; from 36 to 70% of a mineral addition A1, the particles of which have a D50 of from 15 to 150 μm; the sum of these percentages being from 80 to 100%; the sum of the percentages of cement and of silica fume being greater than 28%; the mineral addition A1 being selected from slags, pozzolanic additions or siliceous additions such as quartz, silico-calcareous mineral additions, calcareous additions such as calcium carbonate or mixtures thereof.
Abstract:
Concrete that exhibits increased flexibility (i.e., low modulus of elasticity) and high compressive strength is described. High aspect ratio structures as may be formed of the concrete are described. Structures formed of the concrete can have the same high compressive strength as similar structures formed from a more conventional concrete, but can be significantly more flexible, which can allow for better load distribution in the structure and associated assembly. The concrete includes a weathered granite as course aggregate. The materials can be particularly beneficial in forming concrete components of a rail infrastructure, such as railroad ties and slabs.
Abstract:
Ultra-high performance concrete produced from cement, aggregate, water, fillers, and additives, wherein the aggregate comprises 800-1,300 kg of an igneous rock in the form of crushed stone per cubic meter of concrete.
Abstract:
A hydraulic binder includes, as percentage by mass: from 17 to 55% of a Portland cement, the particles of which have a D50 of from 2μm to 11 μm; at least 5% of silica fume; from 36 to 70% of a mineral addition A1, the particles of which have a D50 of from 15 to 150 μm; the sum of these percentages being from 80 to 100%; the sum of the percentages of cement and of silica fume being greater than 28%; the mineral addition A1 being selected from slags, pozzolanic additions or siliceous additions such as quartz, silico-calcareous mineral additions, calcareous additions such as calcium carbonate or mixtures thereof.
Abstract:
There is provided a Ultra-high performance glass concrete (UHPGC) including between 300 and 1000 kg/m3 of cement, between 0 and 1400 kg/m3 of glass sand (GS), between 0 and 300 kg/m3 of reactive pozzolanic material, between 150 and 900 kg/m3 of glass powder (GP), between 0 and 600 kg/m3 of fine glass powder (FGP), between 5 and 60 kg/m3 of superplasticizer, between 50 and 300 kg/m3 of fiber; and, between 130 and 275 kg/m3 of water, wherein the content of GP is of at least 3 wt % of the UHPGC, and/or the content of GS is of at least 19 wt % of the UHPGC and/or the content of FGP is of at least 0.5 wt % of the UHPGC.
Abstract translation:提供了一种超高性能玻璃混凝土(UHPGC),包括300至1000 kg / m3的水泥,0至1400 kg / m3的玻璃砂(GS),0至300 kg / m3的反应性火山灰材料, 150至900kg / m 3的玻璃粉末(GP),0-600kg / m3细玻璃粉末(FGP),5-60kg / m3的超增塑剂,50-300kg / m3纤维之间; 和130至275kg / m 3的水,其中GP的含量为UHPGC的至少3重量%,和/或GS的含量为UHPGC的至少19重量%和/或含量 的FGP为至少0.5wt%的UHPGC。
Abstract:
A ductile ultra-high performance concrete which includes in relative parts by weight: 100 of Portland cement; 50 to 200 of a sand having a single grading with a D1O to D90 between 0.063 and 5 mm, or a mixture of sands, the finest sand having a D1O to D90 between 0.063 and 1 mm and the coarsest sand having a D1O to D90 between 1 and 5 mm; 0 to 70 of a particulate pozzolanic or non-pozzolanic material or a mixture thereof having a mean particle size less than 15 μm; 0.1 to 10 of a water-reducing superplasticizer; 10 to 30 of water; and 0.5 to 5% by volume relative to the volume of the hardened composition of glass fibers having an aspect ratio of 6 to 120.