Use of amorphous silica reagent produced from serpentine in concrete preparation
AssigneesAlliance MagnéSium, Socpra Sciences Et Genie S.E.C.
InventorsJoël FOURNIER, Laury Gauthier, Ablam ZIDOL, Arezki TAGNIT-HAMOU
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Abstract
It is disclosed the use of amorphous silica reagent produced from serpentine as pozzolane additive material, and more particularly a concrete mixture, such as high performance and ultra-high performance concrete, comprising a hydraulic binder; sand; aggregates, chemical admixture, mineral admixture as silica fume and an amorphous silica reagent (AmSR), wherein the AmSR is admixed for example with General Use Portland Cement and provides synergistic effect when combined with silica fume.
Claims18
A concrete mixture comprising:
- a hydraulic binder;
- sand;
- aggregates;
- silica fumes;
- and
- an amorphous silica reagent (AmSR) comprising SiO2 and active MgO;
- and wherein a weight ratio of the silica fumes to the AmSR is from 2.3:1 to 1:2.3,
- wherein the concrete mixture has higher compressive strengths and reduced setting times due to the synergistic combination of AmSR and silica fumes compared to a concrete with only AmSR.
The concrete mixture of claim 14, wherein the leaching is conducted at a temperature between 60 to 125° C.
The concrete mixture of claim 19, wherein said UHPC comprises up to 20% of AmSR.
The concrete mixture of claim 20, wherein said HPC comprises:
- GU cement;
- silica fume (SF);
- AmSR;
- water;
- sand;
- aggregates;
- an entraining admixture;
- and
- a superplasticizer.
The concrete mixture of claim 20, wherein said UHPC comprises:
- water;
- silica fume;
- cement;
- quartz powder;
- sand;
- and
- AmSR.
Dependencies are inferred from the claim text.