摘要:
A method for making a carbonated precast concrete product includes: obtaining a mixture including at least one binder material, an aggregate, and water; molding the mixture into a molded intermediate; demolding the molded intermediate to obtain a demolded intermediate, the demolded intermediate having a first water-to-binder ratio; conditioning the demolded intermediate to provide a conditioned article having a second water-to-binder ratio less than the first water-to-binder ratio of the demolded intermediate; moisturizing at least one surface of the conditioned article with an aqueous medium, thereby causing a weight gain of the conditioned article and providing a moisturized product, a first portion of the moisturized product having a third water-to-binder ratio greater than a fourth water-to-binder ratio of a remainder of the moisturized product; and curing the moisturized product with carbon dioxide to obtain the carbonated precast concrete product.
摘要:
A concrete curing blanket includes a layer of absorbent material and a layer of impervious material bonded to the absorbent material layer in face-to-face relationship at intermittent locations such that the impervious material layer between the intermittent locations can lift away from the layer of absorbent material in response to air bubbles rising through the layer of absorbent material. The intermittent bonding locations may take the form of a pattern or may have a random occurrence. The absorbent layer of material is a hydrophilic nonwoven fabric and the impervious material layer is a film.
摘要:
The present invention relates to hydraulically bonded cement compositions and methods. More particularly, the present invention is directed to novel compositions and methods of hydrating hydraulic cement without mechanical mixing of the cement and water. The present invention includes materials prepared by manipulating under pressure powdered hydraulic cement compositions using known or novel powder packing, casting, or expanding techniques, such that air within the powdered hydraulic cement is substantially removed while the cement is formed into a self-supporting near net final position. Thereafter, the formed hydraulic cement is hydrated without mechanical mixing of the cement and water.
摘要:
A brick includes a thermoplastic material, such as high density polyethylene (HDPE), and a cement-containing material. The brick may be made by mixing thermoplastic material and dry, uncured cement-containing material. This mixture is placed in a mold. The mold is heated while the mixture is compressed to melt or soften the thermoplastic material and to bind the particulate material in the mold into the shape of a brick. After the hardened brick is removed from the mold, the surface of the brick may be sprayed with water to cure cement-containing material on the surface of the brick.
摘要:
A brick comprises a thermoplastic material, such as high density polyethylene (HDPE), and a cement-containing material. The brick may be made by mixing thermoplastic material and dry, uncured cement-containing material. This mixture is placed in a mold. The mold is heated while the mixture is compressed to melt or soften the thermoplastic material and to bind the particulate material in the mold into the shape of a brick. After the hardened brick is removed from the mold, the surface of the brick may be sprayed with water to cure cement-containing material on the surface of the brick.
摘要:
Disclosed is a method of manufacturing an artificial stone, and the method includes forming an artificial-stone paste which comprises 20-20 parts by weight of silica stone, metakaolim or silica fume, 200-300 parts by weight of quartz chips, 30-36 parts by weight if water, 1.5-3 part by weight of water-reducing agent and 0.2-3 parts by weight of pigment with response to 100 parts by weight of white cement; injecting the artificial-stone paste in a mold; primarily vacuum-molding the artificial-stone paste injected in the mold; secondarily vibration-molding the primarily molded artificial-stone paste; primarily curing the secondarily molded artificial-stone paste; secondarily curing the primarily cured artificial-stone paste, which induces a hydrothermal reaction and thus causes a pozzolanic reaction; releasing the secondarily cured artificial-stone paste from the mold; and surface-machining the released artificial-stone paste.
摘要:
A system for automatically and periodically applying moisture to curing concrete that can be transported from one location to another is provided. A portable concrete curing unit receives water from a water source and distributes such water to a moisture applicator that is situated near a curing concrete object. The moisture applicator applies moisture to the curing concrete so as to maintain the concrete object at a desired moisture level during the curing process. The concrete curing unit may contain a power source, a pump, and a controller. The controller is connected to the pump such that the pump will distribute water to the moisture applicator during an activation period. This timing function of the controller allows for a system and method of automatically and periodically curing concrete that can be controlled by the user without extensive need for manual labor during the concrete curing process.
摘要:
A system for automatically and periodically applying moisture to curing concrete that can be transported from one location to another is provided. A portable concrete curing unit receives water from a water source and distributes such water to a moisture applicator that is situated near a curing concrete object. The moisture applicator applies moisture to the curing concrete so as to maintain the concrete object at a desired moisture level during the curing process. The concrete curing unit may contain a power source, a pump, and a controller. The controller is connected to the pump such that the pump will distribute water to the moisture applicator during an activation period. This timing function of the controller allows for a system and method of automatically and periodically curing concrete that can be controlled by the user without extensive need for manual labor during the concrete curing process.