A method for making geopolymer cementitious binder compositions for cementitious products such as concrete, precast construction elements and panels, mortar and repair materials, and the like is disclosed The geopolymer cementitious compositions of some embodiments are made by mixing a synergistic mixture of thermally activated aluminosilicate mineral, calcium aluminate cement, a calcium sulfate and a chemical activator with water

Dimensionally stable geopolymer composition and method

A hose fault detection system (10) includes a hose assembly (12) including a hose (16) having first and second conductive layers (20), (24). The hose assembly (12) has an electrical characteristic. A fault detector (14) is in electrical communication with the first and second conductive layers (20), (24). The fault detector (14) includes an indicator (74) operatively connected to the hose assembly (12). A method for monitoring the structural integrity of a hose assembly (12) includes providing a fault detection system (10) having a hose assembly (12) including a hose (16) having a first conductive layer (20) and a second conductive layer (20), (24). The hose assembly (12) has an electrical characteristic. The electrical characteristic of the hose assembly (12) is compared to a threshold value. A visual indicator (74) in operative communication with the hose assembly (12) is illuminated when the electrical characteristic goes beyond the threshold value.

Degradation detection system for a hose assembly

Improving the functionality and performance of AA2024 corrosion sensing coatings with nanocontainers

A fast-curing pervious concrete mix made by combining : water; a cementitious material comprising portland cement and a supplementary cementitious material; aggregate sized to form a pervious concrete; a water reducer; a quantity of fibers; and a polymeric bonding agent, the mix curing to a compressive strength of at least 2,000 psi within 24 hours of placement. Also, a method of forming a pervious concrete structure by forming the fast-curing pervious concrete mix, placing the mix in a desired formation, and curing the placed mix, and a pervious concrete obtained by placing and curing the fast-curing pervious concrete mix.

Fast-curing pervious concrete mix

The invention discloses a pervious concrete special-purpose additive and a use thereof. The pervious concrete special-purpose additive comprises, by mass, 10-20% of a polycarboxylic acid water reducer, 5-25% of a polycarboxylic acid slump retaining agent, 0.5-3% of a water-retaining agent, 0.5-5% of a thickening agent, 1-5% of a delayed coagulant and 52-75% of water. A mass ratio of the additive to the gelling material in the pervious concrete is 1-2%. Ingredients of the pervious concrete special-purpose additive produce good synergism. The pervious concrete special-purpose additive guarantees water permeability, well keeps pervious concrete workability for 2h or more, improves strength after aging and realizes pervious concrete premixing production.

Pervious concrete special-purpose additive and use thereof

PROBLEM TO BE SOLVED: To provide a corrosion detecting member and corrosion sensor that have high sensitivity and can clearly predict the corrosion start time of metallic material to be measured. SOLUTION: The corrosion detecting member 111 of the corrosion sensor is used for detecting a corrosion progress situation of the metallic material to be measured. The corrosion detecting member 111 comprises detection sections (A 1 -A n ) that are formed by covering base materials (B 1 -B n ) made of metal or alkali soluble metal corroding more easily than the metal to be detected under a using environment of the detected object and at least a part of the base material and are formed of coatings (C 1 -C n ) made of metal corroding under the using environment of the detected object, and a base material 113 for holding the detection sections. COPYRIGHT: (C)2007,JPO&INPIT

Corrosion detecting member and corrosion sensor

PROBLEM TO BE SOLVED: To precisely detect the filled situation of a form of fluid, such as concrete and grout, and a sheath pipe, or the like in civil execution or construction execution into a space to be filled, and a corroded state of a steel material, or the like by radio communication and with low consumption power without damaging the durability of the concrete. SOLUTION: There are provided: a pair of electrodes 10a, 10b; a resistor 11 inserted between the electrodes 10a, 10b; a fill detection section 2 for detecting the electrical characteristics between the electrodes by applying voltage between the electrodes 10a, 10b; a steel material, or a metal member 10c for detection provided near the steel material; a corrosion detection section 2 for detecting the corrosion of a member 10c for detection by measuring the electrical characteristics of the member for detection; and a radio communication section 3 for transmitting the detected result by the fill detection section 2 and the corrosion detection section 2 to a reading apparatus by radio. COPYRIGHT: (C)2007,JPO&INPIT

Compound sensor module, sheath pipe, and sheath pipe joint member

PROBLEM TO BE SOLVED: To provide a high-strength mortar having a large ratio of a flexural strength to a compression strength, and further to provide a high-strength concrete. SOLUTION: This high-strength mortar comprises at least a cement, a pozzolanic fine powder, a fine aggregate having ≤2 mm particle diameter, a water reducing agent, water and a shrinkage-reducing agent. Preferably, the high-strength mortar contains a metallic fiber and/or an organic fiber, a quartz powder having 3-20 μm average particle diameter, fiber particles having ≤1 mm average particle diameter or a flaky particles besides them. The high- strength concrete comprises a coarse aggregate and the high-strength mortar. COPYRIGHT: (C)2001,JPO

High-strength mortar and high-strength concrete

PROBLEM TO BE SOLVED: To provide a bolt and its axial force information system, by which the axial force can be monitored easily. SOLUTION: The bolt is provided which has a strain gauge in its axial part, and is integrated with an antenna and an RFID tag with a strain detector circuit mounted thereon, and which uses an RFID technique for transferring information on the axial force detected by the strain gauge to a reader/writer outside the bolt. COPYRIGHT: (C)2010,JPO&INPIT

Bolt and system for processing information on axial force of bolt

PROBLEM TO BE SOLVED: To provide water-permeable concrete which has a high permeability coefficient and high compressive strength and can easily be shaped. SOLUTION: The production process of the water-permeable concrete comprises: charging a mixed material of a composition consisting of 100 pts.vol. of coarse aggregate and 30-80% pts.vol. of paste or mortar, into a form to obtain a formed body; and curing the formed body; wherein the paste or mortar comprises 100 pts.wt. of cement or a powdery mixture containing cement, 0-300 pts.wt. of fine aggregate, 0.1-3.0 pts.wt. (expressed in terms of solid content) of a water reducing agent or AE water reducing agent (air entraining and water reducing agent) and 20-40 pts.wt. of water. COPYRIGHT: (C)2003,JPO

Tatsuzo Sato

Papers

Corrosion detecting member and corrosion sensor

Compound sensor module, sheath pipe, and sheath pipe joint member

High-strength mortar and high-strength concrete

Bolt and system for processing information on axial force of bolt

Water permeable concrete