A groove is formed on one end face side of a cage including a plurality of pockets for holding individually rolling elements which extends circumferentially along a full circumference of the cage about a rotational center thereof and has a bottom portion which communicates individually with the plurality of pockets, and a distal end portion of a nozzle of an oil supply unit is inserted into the groove, whereby the generation of disturbance to airflow and negative pressure in the vicinity of an opening of the nozzle is suppressed when a rolling bearing rotates, so that lubricating oil supplied from the nozzle is allowed to reach the rolling elements in an ensured fashion.

Rolling bearing device

Polymer powders redispersible in water in paving joint mortars, the paving jointing mortar having approximately 0.5% by weight or more, based on the paving joint dry mortar, of one or more mineral binders, as well as one or more additives and, if necessary, further components. The paving joint mortar can be introduced into a joint in powder form and subsequently watered, or the paving joint mortar can be mixed with water before introduction into the joint and added to the joint in paste form.

Paving joint mortars

The invention discloses an assembled concrete traffic pavement which is formed by splicing pavement prefabricated members, wherein each pavement prefabricated member comprises an upper wear-resisting layer and a lower stress structure layer, and the wear-resisting layer is fixedly connected with the lower stress structure layer; gaps are reserved at the spliced joints of the mutually spliced pavement prefabricated members, and a gap stress layer is formed on the gap poured concrete. The invention further discloses a construction method of the assembled concrete traffic pavement. The pavement prefabricated members disclosed by the invention are light in structure, high in strength, and good in wear resistance, and are integrally fabricated and spliced to form a traffic pavement, and the pavement is short in construction period and is not limited by weather and seasons.

Assembled concrete traffic pavement and construction method thereof

611648 Disclosed is a brick, block, or paver which includes an aggregate of recycled glass. The aggregate of recycled glass is in the form of glass sand with the majority of the particles of the glass sand having a particle size of approximately 2.5mm or less. The brick, block, or paver is subject to a treatment to expose the glass on at least one face. The glass sand represents between 20% and 50% of the overall aggregate in the mix, and the remainder of the aggregate in the mix is quartz sand or quartz sand and blue metal. The treatment may be a surface treatment, such as acid washing, sand blasting, grinding, polishing, brushing, saw cutting or splitting the brick, block or paver prior to, or following, curing to form a face.

Bricks, blocks and pavers

A paving brick for sidewalk and public square is composed of surface material and substrate material. Said surface material contains less pigment and brightening agent and said substrate material includes a lot of heavy slags not to be used easily. The paving brick features the patterns and markers on it. Its advantages are not decolouring, antiwear nature, dirting and thawing resistance and reducing environmental pollution.

Shiny color heavy cinder and cement tiles for pavement

PURPOSE: To inhibit a liquid drop to a side face minimally by constituting a stepped section of a specified inclined plane and a flat plane near the outer circumferential end of the surface of a base block and forming a pan-shaped recessed section at the central section of the surface of the block CONSTITUTION: In a base block 1, a corner section is chamfered from a place separate from the outer circumferential end of a surface by a distance (a) in the horizontal direction to a place separate from the flat plane 5 of a projecting section by a distance a' in the depth direction, and a stepped section with an inclined plane 2 is formed A pan-shaped recessed section 4 is formed at the central section of the surface of the base block 1, and the inclined plane of a side face (d) and a base are tied in a curved surface shape, thus easily forming the base block 1, then resulting in the state of the easy escape of bubbles generated on the interface of filled paints and a recessed- section forming surface When the block for pavement is manufactured, the base block 1 having a specified shape is formed through a simultaneous mold-release system etc, a section upper than the projecting-section flat plane 5 is coated with paints after curing and primer treatment to form paint layers 6, 6a, and a frame body 7, on which glass beads are scattered uniformly and which is heated, is moved along the side face of the base block

Block for pavement and manufacture thereof

PROBLEM TO BE SOLVED: To provide a technique capable of obtaining concrete block pavement having excellent durability. SOLUTION: As a leveling substratum for concrete block pavement to be laid on a subgrade in contact with the bottom surface of concrete block used for concrete block pavement, the substratum having CBR (test method: Specified in JIS A 1211) of 40 to 500% is used.

Leveling substratum for concrete block pavement, paving construction and paving construction method

PROBLEM TO BE SOLVED: To ensure the drainage performance of a concrete member and to exhibit noise attenuating performance at low cost, by constituting the concrete member out of a surface layer formed of porous concrete and a substrate formed of normal concrete, and supporting and reinforcing the water-permeable surface layer by the water-impermeable substrate. SOLUTION: There is provided a concrete member for pavement, which is constituted of a water-permeable surface layer 1 formed of porous concrete, and a water-impermeable substrate 2 formed of normal concrete, which supports and reinforces the former, to thereby exhibit sufficient drainage performance and attenuate noise. In this case, intercommunicating porosity of the porous concrete constituting the surface layer 1 is set to 10 to 35%, and thickness H1 of the same is set to 5 to 120 mm. Further, intercommunicating porosity of the normal concrete constituting the substrate 2 is set to 0 to 10%, and thickness H2 of the same is set to 5 to 120 mm. Therefore, the concrete member for pavement, which has sufficient drainage performance, noise attenuating effect, and strength, and produced at low cost, can be obtained. Thus, the pavement structure having drainage performance can be simplified, to thereby reduce overall construction costs.

Concrete member for pavement and pavement structure

PURPOSE:To obtain feeding device of concrete and its feeding method used for recycling concrete block, in which neither the manual handling of the block nor entanglement of the blocks with each other occurs. CONSTITUTION:In the feeding device of concrete block to crushing device consisting of a charging bucket 1, a receiving hopper 2, a feeder 4, which transfers blocks charged in the hopper, and a crusher 5, which crushes the blocks sent from the feeder 4, a vibrator 8 is attached to the charging bucket 1 and, at the same time, the charging bucket 1 is so constituted as to be able to position at the predetermined angle theta from the horizontal position to the charging direction.

Feeding device of concrete block and feeding method

PROBLEM TO BE SOLVED: To prevent the occurrence of breakage, such as a crack and a corner chip, by regulating a shape and size, even in a block for pavement having a specified bending strength and compressive strength SOLUTION: In a block 10 for pavement formed in a polygonal shape in a plane of an exposure surface and having a bending strength of 10-30kgf/cm or a compressive strength of 50-170kgf/cm , the length of a longest center of figure straight line 10A passing a center of figure O of a plane figure is set to a value lower than a value increased 25 times as long as the length of a shortest center of figure straight line 10S, and the length of the longest center of figure straight line 10A is set to 5-30cm, thickness (t) to 5cm or more, and an internal angle θ to 45 deg or more

Suda Shigeo

Papers

Block for pavement and manufacture thereof

Leveling substratum for concrete block pavement, paving construction and paving construction method

Concrete member for pavement and pavement structure

Feeding device of concrete block and feeding method

Block for pavement