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US 12,391,614 B2Granted
Method of pressure-pumping ready-mixed concrete
AssigneeTake Cite Co., Ltd.
InventorMasanari Takeda
Life of this patent
Estimating the term…
Abstract
A method of pressure-pumping a ready-mixed concrete includes pouring a preceding material for pumping into a piping, then, pouring the ready-mixed concrete into the piping, and pressure-pumping the preceding material and the ready-mixed concrete, so that a lubricant layer formed of the preceding material is formed on an inner surface of the piping to thereby pressure-pump the ready-mixed concrete inside the lubricant layer made of the preceding material. The preceding material includes calcium carbonate as a main material, to which cellulose nanofibers and erythorobic acid are added, and an amount of the cellulose nanofibers is 0.005 wt % or more.
Claims13
A method of pressure-pumping a ready-mixed concrete, comprising:
- pouring a preceding material for pumping into an outlet of a hopper connected to a pump,
- subsequently, pouring the ready-mixed concrete into the outlet of the hopper over the preceding material,
- pressure-pumping the preceding material and the ready-mixed concrete together towards a piping connected to an outlet of the pump, so that a lubricant layer comprising the preceding material is formed on an inner surface of a piping,
- pressure-pumping a top end portion of the ready-mixed concrete so as to push a rear end of the preceding material inside the piping,
- wherein the preceding material comprises calcium carbonate, cellulose nanofibers and erythorobic acid,
- wherein the calcium carbonate comprises porous calcium carbonate, hydrotalcite-containing porous calcium carbonate, and sedimentary calcium carbonate,
- wherein the porous calcium carbonate and the hydrotalcite-containing porous calcium carbonate are processed by treating the ready-mixed concrete sludge yielded in a ready-mixed concrete plant, for a particle size adjustment and an ingredient adjustment, and the sedimentary calcium carbonate has a uniform particle shape by chemical treatment, and
- wherein an amount of the cellulose nanofibers is 0.005 wt % to 0.008 wt %.
5 more elements
A method of pressure-pumping a ready-mixed concrete, comprising:
- preparing a preceding material by mixing calcium carbonate, cellulose nanofiber, and erythorobic acid,
- pouring the preceding material for pumping into an outlet of a hopper connected to a pump,
- subsequently, pouring the ready-mixed concrete into the outlet of the hopper over the preceding material,
- pressure-pumping the preceding material and the ready-mixed concrete together towards a piping connected to an outlet of the pump, so that a lubricant layer comprising the preceding material is formed on an inner surface of the piping,
- pressure-pumping a top end portion of the ready-mixed concrete so as to push a rear end of the preceding material inside the piping,
- wherein the preceding material comprises calcium carbonate, cellulose nanofibers and erythorobic acid,
- wherein the calcium carbonate comprises porous calcium carbonate, hydrotalcite-containing porous calcium carbonate, and sedimentary calcium carbonate,
- wherein the porous calcium carbonate and the hydrotalcite-containing porous calcium carbonate are processed by treating the ready-mixed concrete sludge yielded in a ready-mixed concrete plant, for a particle size adjustment and an ingredient adjustment, and the sedimentary calcium carbonate has a uniform particle shape by chemical treatment, and
- wherein an amount of the cellulose nanofibers is 0.005 wt % to 0.008 wt %.
6 more elements
A method of pressure-pumping a ready-mixed concrete, comprising:
- pouring a preceding material for pumping into a discharge side of a pump,
- subsequently, pouring the ready-mixed concrete into a hopper connected to the pump over the preceding material,
- pressure-pumping the preceding material and the ready-mixed concrete together towards a piping connected to an outlet of the pump, so that a lubricant layer comprising the preceding material is formed on an inner surface of the piping,
- pressure-pumping a top end portion of the ready-mixed concrete so as to push a rear end of the preceding material inside the piping,
- wherein the preceding material comprises calcium carbonate, cellulose nanofibers and erythorobic acid,
- wherein the calcium carbonate comprises porous calcium carbonate, hydrotalcite-containing porous calcium carbonate, and sedimentary calcium carbonate,
- wherein the porous calcium carbonate and the hydrotalcite-containing porous calcium carbonate are processed by treating the ready-mixed concrete sludge yielded in a ready-mixed concrete plant, for a particle size adjustment and an ingredient adjustment, and the sedimentary calcium carbonate has a uniform particle shape by chemical treatment, and
- wherein an amount of the cellulose nanofibers is 0.005 wt % to 0.008 wt %.
5 more elements
Dependencies are inferred from the claim text.