Methods and an associated system for processing unhardened concrete are disclosed. With these methods, the porosity of the unhardened concrete is significantly increased to decrease the strength so much that it can be easily broken up for sale or reuse. In at least one embodiment, the method includes adding a large volume of foam to the returned unhardened concrete and then mixing the foam with the returned concrete in the ready-mix concrete truck or other concrete mixing devices at any location including the jobsite, enroute to the concrete plant, or at the concrete plant. Through the mixing of foam with the returned concrete, the hydrated cement and aggregate particles are separated by large volumes of air voids, which significantly increase the porosity and dramatically reduce the strength of the returned concrete. The treated concrete is discharged and allowed to solidify in this weakened state, after which it is easily broken into loose particulate material that can be sold or reused.

Methods and an associated system for processing unhardened concrete are disclosed. With these methods, the porosity of the unhardened concrete is significantly increased to decrease the strength so much that it can be easily broken up for sale or reuse. In at least one embodiment, the method includes adding a large volume of foam to the returned unhardened concrete and then mixing the foam with the returned concrete in the ready-mix concrete truck or other concrete mixing devices at any location including the jobsite, enroute to the concrete plant, or at the concrete plant. Through the mixing of foam with the returned concrete, the hydrated cement and aggregate particles are separated by large volumes of air voids, which significantly increase the porosity and dramatically reduce the strength of the returned concrete. The treated concrete is discharged and allowed to solidify in this weakened state, after which it is easily broken into loose particulate material that can be sold or reused.

Methods and an associated system for processing unhardened concrete are disclosed. With these methods, the porosity of the unhardened concrete is significantly increased to decrease the strength so much that it can be easily broken up for sale or reuse. In at least one embodiment, the method includes adding a large volume of foam to the returned unhardened concrete and then mixing the foam with the returned concrete in the ready-mix concrete truck or other concrete mixing devices at any location including the jobsite, enroute to the concrete plant, or at the concrete plant. Through the mixing of foam with the returned concrete, the hydrated cement and aggregate particles are separated by large volumes of air voids, which significantly increase the porosity and dramatically reduce the strength of the returned concrete. The treated concrete is discharged and allowed to solidify in this weakened state, after which it is easily broken into loose particulate material that can be sold or reused.

A process and method for solving the high need for a sustainable materials and good energy economy in the area of buildings and civil infrastructures in a value added and ecological way is described. The solution is a processing method and mix design of a recovered hydraulic composite material, starting from mixed construction or demolition wastes and ending into the hydraulic composite material. The raw materials of this recovery composite material comprise before adding water dominantly (90-100 mass %) recycling materials, which are processed at a concentrated plant. Waste is collected from mixed construction and demolition wastes on site and from selected byproducts of the industry. The share of construction or demolition wastes alone is more than 50 mass-% and more than 60 volume-% of the dry composite material mix. Harmful constituents are separated from the constituents of the composite in the waste treatment process. The density of the composite varies and can be specified through the mix recipe.

A process and method for solving the high need for a sustainable materials and good energy economy in the area of buildings and civil infrastructures in a value added and ecological way is described. The solution is a processing method and mix design of a recovered hydraulic composite material, starting from mixed construction or demolition wastes and ending into the hydraulic composite material. The raw materials of this recovery composite material comprise before adding water dominantly (90-100 mass %) recycling materials, which are processed at a concentrated plant. Waste is collected from mixed construction and demolition wastes on site and from selected byproducts of the industry. The share of construction or demolition wastes alone is more than 50 mass-% and more than 60 volume-% of the dry composite material mix. Harmful constituents are separated from the constituents of the composite in the waste treatment process. The density of the composite varies and can be specified through the mix recipe.

A process and method for solving the high need for a sustainable materials and good energy economy in the area of buildings and civil infrastructures in a value added and ecological way is described. The solution is a processing method and mix design of a recovered hydraulic composite material, starting from mixed construction or demolition wastes and ending into the hydraulic composite material. The raw materials of this recovery composite material comprise before adding water dominantly (90-100 mass %) recycling materials, which are processed at a concentrated plant. Waste is collected from mixed construction and demolition wastes on site and from selected byproducts of the industry. The share of construction or demolition wastes alone is more than 50 mass-% and more than 60 volume-% of the dry composite material mix. Harmful constituents are separated from the constituents of the composite in the waste treatment process. The density of the composite varies and can be specified through the mix recipe.

The present description relates to method of initiating the curing of carboxylic acid-treated material compositions to enable an initial lowering of the viscosity and stiffness of the material for low temperature wetting and coating of solid surfaces, for paving, for waterproofing, for roofing, and for underlayment applications. The present description relates to ecologically sound, non-toxic technology that enables a practitioner to improve the low-temperature cracking properties of a material or material composition while also inducing a rapid increase in the high-temperature stiffness and viscosity of the material or material composition, and to rapid cure and strength development of finished product composition for application in paving, roofing, adhesive interlayer bonding, roll finishing, blow-molding, water-proofing, and underlayment.

The present description relates to method of initiating the curing of carboxylic acid-treated material compositions to enable an initial lowering of the viscosity and stiffness of the material for low temperature wetting and coating of solid surfaces, for paving, for waterproofing, for roofing, and for underlayment applications. The present description relates to ecologically sound, non-toxic technology that enables a practitioner to improve the low-temperature cracking properties of a material or material composition while also inducing a rapid increase in the high-temperature stiffness and viscosity of the material or material composition, and to rapid cure and strength development of finished product composition for application in paving, roofing, adhesive interlayer bonding, roll finishing, blow-molding, water-proofing, and underlayment.

The invention is directed to compositions and methods for the manufacture of pigmented solids structures for which can be used for construction and/or decoration. Manufacturing comprises fixing one or more pigments to an aggregate material such as crushed rock, stone or sand. The pigmented aggregate is incubated with urease or urease producing microorganisms, an amount of a nitrogen source such as urea, and an amount of calcium source such as calcium chloride forming calcite bridges between particles of aggregate. The resulting solid has a hardness and colorfastness for most any construction material. Using selected aggregate and pigment, the process also provides for the manufacture of simulated-stone materials such as clay or granite bricks or blocks, marble counter-tops, and more. The invention is also directed to composition containing microorganisms and pigment as kits that can be added to most any aggregate materials.

The invention is directed to compositions and methods for the manufacture of pigmented solids structures for which can be used for construction and/or decoration. Manufacturing comprises fixing one or more pigments to an aggregate material such as crushed rock, stone or sand. The pigmented aggregate is incubated with urease or urease producing microorganisms, an amount of a nitrogen source such as urea, and an amount of calcium source such as calcium chloride forming calcite bridges between particles of aggregate. The resulting solid has a hardness and colorfastness for most any construction material. Using selected aggregate and pigment, the process also provides for the manufacture of simulated-stone materials such as clay or granite bricks or blocks, marble counter-tops, and more. The invention is also directed to composition containing microorganisms and pigment as kits that can be added to most any aggregate materials.