Patent
Quick hardening type water permeable concrete
Katsutoshi Ichikawa,Satoshi Kajio,Hiroshi Kuga,Akira Obata,Mitsuyoshi Okada,Onishi Tatsuto,Tatsuzo Sato,比呂氏 久我,達三 佐藤,達人 大西,明 小畠,光芳 岡田,勝俊 市川,聡 梶尾 +13 more
TLDR
In this paper, a quick hardening type water permeable concrete is produced by molding a mixed/kneaded material of a composition comprising coarse aggregate and paste or mortar or which a volume ratio thereof to the coarse aggregate is 30 to 80%.Abstract:
PROBLEM TO BE SOLVED: To obtain a quick hardening type water permeable concrete having excellent water permeability, high flexural strength and excellent development of early age strength. SOLUTION: This quick hardening type water permeable concrete is produced by molding a mixed/kneaded material of a composition comprising coarse aggregate and paste or mortar or which a volume ratio thereof to the coarse aggregate is 30 to 80%. The paste or mortar comprises 100 pts.wt. of a hydraulic material, 0 to 150 pts.wt. of fine aggregate, 0.1 to 2.0 pts.wt. of a water reducing agent and 15 to 30 pts.wt. of water. The hydraulic material is a quick hardening cement comprising 20 to 60 wt.% of a clinker consisting mainly of calcium sulfoaluminate, 20 to 70 wt.% of a Portland cement clinker, 0.5 to 30 wt.% of anhydrous gypsum, 0.1 to 3.0 wt.% of an alkali metal carbonate and 0.05 to 4.0 wt.% of an organic acid, wherein molar ratio of SO3/Al2O3 is 1.0 to 1.4. COPYRIGHT: (C)2002,JPOread more
Citations
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Patent
Water permeable concrete
TL;DR: In this paper, the authors proposed a water-permeable concrete which has a high permeability coefficient and high compressive strength and can easily be shaped, and the production process of the water permeability concrete comprises: charging a mixed material of a composition consisting of 100 pts.vol.
Patent
Instant stripping porous concrete compact
Minoru Hata,Osamu Tomita,治 富田 +2 more
TL;DR: In this paper, an instant stripping porous concrete compact is obtained in such a way that kneaded matter of a coarse aggregate and a composition of 10-80% paste or mortar in terms of vol% to the coarse aggregate is cast into a form and formed therein, the obtained compact is instant stripped, after that, it is subjected to curing.
Patent
High-speed railway concrete loss quick repairing material and preparing method thereof
TL;DR: In this paper, a building material is prepared from, by weight, 90-100 parts of high-heat quick-set concrete, 40-80 parts of water-borne epoxy resin emulsion, 3-6 parts of curing agent, 7-12 parts of rubber powder, 1-2 parts of silane coupling agent, 0.3-0.5part of early-strength accelerator, 200-400 parts of fine aggregates, 10-15 parts of strengthening powder and 15-20 part of water.
References
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Patent
Quick hardening cement
TL;DR: In this paper, the authors proposed to improve strength-exhibiting characteristic and stability of a quick hardening cement at low temp. and to prevent a reaction between alkali and aggregate by mixing a specified clinker, Portland cement clinker and II type anhydrous gypsum, Li2CO3, and a hydroxycarboxylic acid.
Patent
Porous concrete and production of molded article thereof
TL;DR: In this paper, a coarse aggregate, powder comprising cement and other materials to be optionally added, a fine aggregate in the weight ratio to the powder of 0-300, water in the water ratio to power of 8-30% and a surfactant in the weighted ratio to powder of 1-5% are fed to a mixer in the volume ratio of the paste to the coarse aggregate of 30-50%.
Patent
Instantaneously demoldable porous concrete molding and its production
TL;DR: In this article, an instantaneously demoldable porous concrete molding is obtained by combining particle bodies, each of which is formed by covering a coarse aggregate with a paste or mortal having 150-300mm consistency as paste flow or mortal flow of 1-mm average thickness.
Patent
Production of porous concrete molded product
TL;DR: In this article, a sheet having the elasticity and 2-10 mm thickness is placed on a bottom plate of a formwork and a mutually independent granular material in a state in which a coarse aggregate is coated with an unhardened paste or an un-hardened mortar is charged thereonto.