The invention comprises a method of forming a slab on grade. The method comprises placing a first layer of insulating material horizontally on the ground and placing plastic concrete for a slab on grade on the first layer of insulating material. The plastic concrete is then formed into a desired shape having a top and sides. A second layer of insulating material is placed on the top of the plastic concrete and the first and second layers of insulating material are left in place until the concrete is at least partially cured. The second layer of insulating material is then removed. The product made by the method is also disclosed. A slab on grade is also disclosed.

A cementitious composite material for in-situ hydration includes a mesh layer, a cementitious material, a sealing layer, and a containment layer. The mesh layer has a first side and a second side. The mesh layer includes a plurality of discontinuous fibers arranged in a nonwoven configuration and coupled with one another. The cementitious material is disposed within the mesh layer. The cementitious material includes a plurality of cementitious particles. The sealing layer is disposed along the first side of the mesh layer and coupled to the plurality of discontinuous nonwoven fibers. The containment layer is disposed along the second side of the mesh layer and configured to prevent the plurality of cementitious particles from migrating out of the mesh layer.

A cementitious composite material for in-situ hydration includes a mesh layer, a cementitious material, a sealing layer, and a containment layer. The mesh layer has a first side and a second side. The mesh layer includes a plurality of discontinuous fibers arranged in a nonwoven configuration and coupled with one another. The cementitious material is disposed within the mesh layer. The cementitious material includes a plurality of cementitious particles. The sealing layer is disposed along the first side of the mesh layer and coupled to the plurality of discontinuous nonwoven fibers. The containment layer is disposed along the second side of the mesh layer and configured to prevent the plurality of cementitious particles from migrating out of the mesh layer.

The present invention relates to a method for constructing a continuously reinforced concrete pavement using foam shotcrete by: positioning continuous reinforcement bars on a base layer where a concrete pavement is constructed; producing normal concrete having a compressive strength of 21-30 MPa from a batch plant and transporting same to a construction site; and shooting a normal strength concrete, which has been produced by mixing, with a mixing part, fly ash or fine slag powder or a low-grade mixed material produced by mixing the fly and the fine slag powder in a state in which fluidity has been increased by mixing in 20-40% of air bubbles with respect to volume, or shooting a high-performance concrete, which has been produced by mixing, with the mixing part, one or a mixture of two or more of silica fume, meta-kaolin, latex, polymers, and a coloring material.

The present invention relates to a method for constructing a continuously reinforced concrete pavement using foam shotcrete by: positioning continuous reinforcement bars on a base layer where a concrete pavement is constructed; producing normal concrete having a compressive strength of 21-30 MPa from a batch plant and transporting same to a construction site; and shooting a normal strength concrete, which has been produced by mixing, with a mixing part, fly ash or fine slag powder or a low-grade mixed material produced by mixing the fly and the fine slag powder in a state in which fluidity has been increased by mixing in 20-40% of air bubbles with respect to volume, or shooting a high-performance concrete, which has been produced by mixing, with the mixing part, one or a mixture of two or more of silica fume, meta-kaolin, latex, polymers, and a coloring material.

Fasteners for securing reinforcing structures, such as rebar, to road beds prior to laying the road material, such as concrete or asphalt. The fasteners are particularly suited for use when a geotextile fabric, or other underlayment, is present between the reinforcing structure and the road bed. The fasteners have at least one leg having an end and an opposite end, such as a self-centering end or a radiused end. In use, a fastener is positioned over a reinforcing structure with the leg(s) extending alongside the reinforcing structure and the radiused end extending over the structure. Applying force (e.g., percussive force) to the end, such as by pounding or hammering, will drive the fastener through the fabric and fasten the reinforcing structure to the fabric.

Fasteners for securing reinforcing structures, such as rebar, to road beds prior to laying the road material, such as concrete or asphalt. The fasteners are particularly suited for use when a geotextile fabric, or other underlayment, is present between the reinforcing structure and the road bed. The fasteners have at least one leg having an end and an opposite end, such as a self-centering end or a radiused end. In use, a fastener is positioned over a reinforcing structure with the leg(s) extending alongside the reinforcing structure and the radiused end extending over the structure. Applying force (e.g., percussive force) to the end, such as by pounding or hammering, will drive the fastener through the fabric and fasten the reinforcing structure to the fabric.

Various embodiments of the present disclosure provide a cast-in-place concrete slab load transfer and slab connection apparatus and method of employing same.

Two slab bolster elements having rails supported on legs for carrying rebar during casting are connected end to end by a blade for sliding longitudinally of the rail into a female receptacle and a releasable locking mechanism which acts to lock the blade in the female receptacle. The locking mechanism comprises a notch on one side surface of the blade and a projecting portion of the female receptacle engaged into the notch. The projecting portion is carried on the female receptacle by a portion which can flex to cause the projecting portion to move away from the side surface of the blade. The female receptacle includes a manually depressible member on a side of the female receptacle opposite the projecting portion which when depressed provides motion toward the female receptacle which causes the projecting portion to move out of the notch.

The present disclosure relates to a slab bolster upper for supporting rebars in a reinforced concrete structure. The slab bolster upper comprises an elongated base defining a lower surface, an upper surface for supporting the rebars, a first edge and a second edge opposite the first edge, voids formed through the elongated base to facilitate free flow of concrete therethrough and around the elongated base, a first connexion integrally formed about the first edge of the elongated base and a second connexion integrally formed about the second edge of the elongated base. The first and second connexions are configured to securely engage with corresponding first and second connexions of adjacent slab bolster uppers for interconnecting a plurality of slab bolster uppers together.