A construction process for quickly and integrally replacing a damaged pavement slab without suspending flights of civil aviation is provided according to embodiments of the present application, including: a first stage: reinforcing a foundation of a damaged pavement slab by grouting; and a second stage: integrally replacing the damaged slab with early-strength and quick-drying concrete. The construction process of fast overall replacement of a damaged pavement slab in civil aviation non-suspend construction provided by the embodiments of the present application solves the limitations of the traditional pavement slab repair process well. The present application first reinforces the damaged pavement slab foundation through grouting construction to solve the problems of slab bottom vacancy, foundation settlement, and insufficient bearing capacity of the base layer; then uses the early-strength rapid-curing concrete suitable for rapid overall slab replacement of the pavement to carry out overall replacement construction for the damaged pavement slab.

Electromagnetically-induced cement concrete crack self-healing diisocyanate microcapsules include raw materials, in parts by weight, comprising 15-55 parts of petroleum resin, 5-10 parts of paraffin, 5-10 parts of polyethylene wax, 3-10 parts of magnetic iron powder and 20-67 parts of diisocyanate. The diisocyanate microcapsules use the diisocyanate as a core material, and the petroleum resin/paraffin/polyethylene wax/magnetic iron powder mixture as the shell of the capsule. When micro cracks occur in the concrete, the crack propagation can break partial of the microcapsule inside, the diisocyanate inside the microcapsules flows out and diffuses into the crack and is subjected to a solidifying reaction with water in the concrete, so that the crack is repaired in time; and for the microcapsules that are not broken by cracks, external electromagnetic field can be applied to melt the shell to release the diisocyanate inside, thereby diffusing into cracks and solidify with water to repair them.

A system and method for applying a construction material is provided. The system may include a batching and mixing device configured to mix blast furnace slag material, geopolymer material, alkali-based powder, and sand to generate a non-Portland cement-based material, the non-Portland cement-based material including 4% to 45% geopolymer material by weight; greater than 0% to 40% blast furnace slag material by weight, 10% to 45% alkali by weight, 20% to 90% sand by weight, less than 1% sulfate by weight, and/or no more than 5% calcium oxide by weight; a conduit configured to transport the non-Portland cement-based material from the batching and mixing device; and a nozzle configured to receive the non-Portland cement-based material and combine the transported non-Portland cement-based material with liquid to generate a partially liquefied non-Portland cement-based material, wherein the nozzle is further configured to pneumatically apply the partially liquefied non-Portland cement-based material to a surface.

Methods and apparatus are disclosed for stamping concrete. In one aspect, a stamp includes a top surface having a three dimensional pattern similar to the three dimensional pattern on its bottom surface. When a portion of a first stamp overlaps a portion of a second stamp, at least a portion of the three dimensional pattern on the bottom surface of the first stamp engages with at least a portion of the three dimensional pattern on the top surface of the second. The engagement between the three dimensional designs or patterns locks or registers the first stamp to the second stamp. In some aspects, a handle of the first stamp engages with a slot in the second stamp. In some aspects, a magnet of the first stamp is attracted to a magnet of the second stamp.

A system and method for applying a construction material is provided. The method may include mixing one or more of 4%-45% volcanic rock by weight, greater than 0%-40% latent hydraulic material by weight, 10%-45% alkaline component by weight, and 20%-90% aggregate by weight to produce a dry binding agent mixture, using a dry mixer; and combining the dry binding agent mixture with water at a nozzle to produce a sprayable concrete compound.

An asphaltic sealant composition and method which use (a) the incorporation of one or more pigment and/or UV absorbing materials, (b) a low shear production method, and (c) the addition of an epoxidized ester of a vegetable oil or a plasticizer, effective for increasing the degree of dispersion of the pigment material in the sealant composition, to provide improve resistance to UV radiation.

A floor patching composition, including: 100 parts of a dry mortar composition including: 9 to 15 parts of quick-setting cement, and 85 to 94 parts of a sole fine aggregate or a combination of two or more fine aggregates, wherein the sole fine aggregate or the combination has an average true density of 2.8 to 4.0 g/cm.sup.3 and a maximum particle size of 1.2 mm or less; 3 to 18 parts of polymer emulsion solid content having a glass transition temperature (Tg) of equal to or higher than −20° C. and equal to or less than 10° C.; and 6 to 18 parts of water.

A system and method for applying a construction material is provided. The method may include mixing blast furnace slag material, geopolymer material, alkali-based powder, and sand at a batching and mixing device to generate a non-Portland cement-based material. The method may also include transporting the non-Portland cement-based material from the mixing device, through a conduit to a nozzle and combining the transported non-Portland cement-based material with liquid at the nozzle to generate a partially liquefied non-Portland cement-based material. The method may further include pneumatically applying the partially liquefied non-Portland cement-based material to a surface.

Embodiments of a dry mix for producing a concrete composition are provided. The dry mix includes aggregate, cement, and bed ash. The bed ash contains the combustion product of a fluidized bed coal combustion reaction. Additionally, embodiments of a method of preparing the dry mix and embodiments of a method of preparing a concrete composition are provided. The dry mix is also suitable for repairing soil slips, and embodiments of a method of repairing a soil slip are also provided.

Embodiments of a dry mix for producing a concrete composition are provided. The dry mix includes aggregate, cement, and bed ash. The bed ash contains the combustion product of a fluidized bed coal combustion reaction. Additionally, embodiments of a method of preparing the dry mix and embodiments of a method of preparing a concrete composition are provided. The dry mix is also suitable for repairing soil slips, and embodiments of a method of repairing a soil slip are also provided.