Abstract: In order to locate and display the source of a sound such as a noise at a factory or the like accurately even when it is outside, a pair of microphones (M1, M3) and another pair of microphones (M2, M4) are disposed on the X axis and Y axis with a distance L therebetween, respectively, the direction of the sound source is estimated from a difference between sound arrival times to the microphones (M1, M3) and a difference between sound arrival times to the microphones (M2, M4), an image around the estimated location of the sound source is picked up by a camera, and the above estimated location of the sound source is displayed on the above image displayed on the display of a personal computer.

Abstract: A muddy borrow soil base material blasting nozzle which has a muddy borrow soil base material injection port having one end of throttled shape, a cylinder integrally provided at the end of the muddy borrow soil base material injection port, and an air intake port formed near the end of the injection port at the side face of the cylinder, the air intake port being used as an intake port of one or more threadlike, ropelike or tapelike continuous elements into the cylinder, and a process for preparing a vegetation bedrock using the muddy borrow soil base material blasting nozzle having the steps of press-fitting a muddy borrow soil base material into the blasting nozzle, blowing the threadlike, ropelike or tapelike continuous elements introduced by intaking from the air intake port of the blasting nozzle into the cylinder together with the muddy borrow soil base material from the discharging port of the nozzle toward the surface to be executed to prepare a plant germinating and growing bedrock.

Abstract: A shuttering used for forming concrete comprises a plate with a plurality of through holes opening on both its face and reverse, and a double woven fabric consisting of a face tissue which permits passage of water but prevents concrete from passing and a reverse tissue opposed to the face of the plate and relatively displaceable with respect to the face of the plate; the surplus water oozing out of placed concrete flows through gaps formed by the reverse tissue between said plate and the face tissue as well as the through holes of said plate.

Abstract: A grout material comprises a pulverulent body having a silicone coating portion formed on at least a part of the surface of a base material. The particle size of the pulverulent body ranges from 1 to 10 .mu.m. A grouting method using a grout material comprises the steps of boring a hole in a predetermined portion of an area to be grouted, supplying to the hole a powdery grout material containing a pulverulent body having a silicone coating portion formed on at least a part of the surface of a base material and thereby grouting the grout material into the periphery of the hole.

Abstract: Concrete forms comprising a first cloth sheet permitting surplus water and air contained in concrete cast in the form to pass therethrough but capable of blocking the passage of the concrete, a second cloth sheet permeably secured to the first sheet, permitting the surplus water and air to pass between and through the first and second sheets and to be absorbed into the second sheet as well as the first sheet, and a support plate to which the second sheet is bonded as by adhesive or thermal bonding acting through only part of the thickness of the second sheet, leaving as water and air permeable throughout the remainder of the second sheet, all of the first sheet, and the interspace therebetween, such being effective as flow paths for surplus water and air to exhaust from the concrete cast in the form to thereby shorten the cure time and improve the strength of the concrete when cured.

Abstract: A form for forming concrete comprises a first sheet permitting surplus water contained in the concrete cast in the form to pass through the first sheet, but capable of blocking the passage of the concrete, a second sheet secured to the first sheet, permitting the surplus water to be absorbed into it, and a plate secured to the second sheet. The first sheet provides paths for the surplus water by the existence of the second sheet. The paths for the surplus water are ensured by a spacer provided between the first sheet and the plate in lieu of the second sheet or together with the second sheet.