30results about How to "Self-compacting" patented technology

The invention relates to a method for producing multifunctional concrete from household garbage power generation waste residues, and belongs to the technical field of novel concrete materials and environmental engineering. The method comprises the following steps: mixing the household garbage power generation waste residues with natural sand to obtain mixed sand; mixing the household garbage power-generation waste residues with the grain sizes greater than 5 mm with crushed stones to obtain mixed crushed stones; mixing natural zeolite powder with brucite fibers to prepare a thickening early-strengthening anti-cracking self-curing agent; mixing a polycarboxylate superplasticizer with ultrafine mineral powder to obtain a liquid water-reducing plasticity-maintaining agent; weighing cement, coal ash, silicon powder, mineral powder, the thickening early-strengthening anti-cracking self-curing agent and the mixed crushed stones in a mass ratio, and pouring into a stirrer successively for uniformly stirring to obtain the multifunctional concrete. The concrete prepared by the method has characteristics of self-compaction, self-curing, low hydration heat, low shrinkage, high durability and high plasticity retention property and can be applied to architectural engineering, civil engineering, traffic engineering, city construction engineering and the like. The method has very high economic and social benefits.

The invention relates to a concrete ingredient and fast hardening concrete prepared by mixing the concrete ingredient, which belong to the field of materials in construction engineering, and are mainly used in masonry or rush repair of the periphery of inspection wells on urban roads. The concrete ingredient includes sulfur aluminum cement, coarse aggregate, fine aggregate, a reinforcing material, an enhancing material, a coloring material, an expanding agent, a water reducing agent and an accelerating agent. In the concrete prepared by mixing the concrete ingredient, the weight ratio of the fast hardening concrete ingredient to water is 1:0.12-0.13. The concrete prepared by mixing the concrete ingredient has the properties of self-leveling, super early strength, high strength, micro expansion, resistance to shrinking, penetration, wear and ageing, and the like.

The invention relates to a method for utilizing domestic garbage power generation fly ash and slag and waste glass abrasive powder as main raw materials to fire ceramsite. According to the method, heavy metal elements in the ash is cured by high-temperature firing; the heavy metal elements are sprayed on the surface of ceramsite by a hydrophobic emulsion, so that ceramsite holes are sealed, the surface is hydrophobic, and outward diffusion and permeation of residual heavy metal elements are prevented; when the ceramiste is utilized to prepare multifunctional concrete, the ceramsite is furtherwrapped by cement mortar. Detection of an environmental protection department shows that the heavy metal content in the cement mortar can meet a three-level soil quality requirement in GB15618-1995 and meet a HJ / T298-2007 hazardous waste identification technique requirement; heavy metal elements in domestic garbage power generation fly ash and slag become harmless; the multifunctional concrete produced from the ceramsite can be applied to the related fields of construction; the domestic garbage power generation fly ash and slag become useful resources.

The invention relates to a manufacturing method of artificial lightweight aggregate or super lightweight aggregate multifunctional concrete and belongs to the technical field of novel concrete materials, environmental engineering and construction. Firstly, a special additive C for preparing the artificial lightweight aggregate or super lightweight aggregate multifunctional concrete is manufactured, a shrinkage restraining additive D is manufactured, after cement, mineral powder, coal ash, microbeads, silica powder, water, glass beads, river sand and other materials are weighed in proportion, the materials are mixed according to the process requirement, and the artificial lightweight aggregate or super lightweight aggregate multifunctional concrete is obtained. According to the method, the multifunctional concrete is manufactured from domestic existing concrete raw materials, industrial residues and other materials, and the product has the functions of self-compaction, self-maintenance, low hydration heat, low shrinkage, high durability and high plasticity retention, and can be applied to constructional engineering, civil engineering, traffic engineering and the like. The manufacturing method has the advantages that construction is convenient, quality is easy to guarantee, management is easy and convenient, and cost is low, energy and resources are saved, and the requirements of environmental protection are met.

The invention belongs to the field of building materials, and specifically discloses a heat-resistant cement-based grouting material and a preparation method thereof. The heat-resistant cement-based grouting material is calculated by weight percentage, and its raw material composition is as follows: cement 36%-48%, aggregate 45%-60%, mineral admixture 5%-12%, water reducing agent 0.3%- 0.6%, defoamer 0.01% ~ 0.08%, stabilizer 0.01% ~ 0.1%, expansion agent 0.5% ~ 3.5%, fiber 0.1% ~ 2%, and water 11% ~ 15%, and remove all water The sum of the components is 100%. The heat-resistant cement-based grouting material of the invention has the advantages of heat resistance, high fluidity, high strength, micro-expansion, self-compacting and the like. The heat-resistant cement-based grouting material of the present invention can be applied to the equipment foundation grouting project with a service temperature of 200-600°C and heat-resistant requirements.

The invention relates to an installing method of a hollow wallboard for a building, in particular to a construction method for eliminating cracks of the hollow wallboard generated by self-gravity settling as priority, belonging to the technical field of buildings. The method comprises the following steps: preparing self-leveling floor mortar doped with a water-reducing agent and a cement expanding agent; wetting the floorslab part of the bottom end of the wallboard with water; drilling a grouting hole leading to a hollow cavity in the wallboard at the lower end of the wallboard; applying pressure to grout mortar to the grouting hole; leading the mortar to flow and fill part of the hollow cavity of the wallboard and bottom seams between floorslabs; and forming a mortar grouting column in the hollow cavity. The installing method can avoid the occurrence of most common cracks after the hollow wallboard is constructed on the basis that the existing construction method of the light wallboard and the basic mixing ratio of the raw materials used for the production of the wallboard are not changed basically.

The invention discloses a prefabricated yielding concrete-filled steel tube support and a manufacturing method thereof. The prefabricated yielding concrete-filled steel tube support consists of a steel tube self-compacting concrete component and a yieldable joint. The steel tube self-compacting concrete component consists of steel tubes and self-compacting concrete packed in the middles of the steel tubes, the yieldable joint consists of a cup-shaped fixing block, a cylindrical rubber pressure bearing body and a sleeve. The multi-section steel tube self-compacting concrete component is assembled into a yieldable concrete-filled steel tube support through the yieldable joint. The prefabricated yielding concrete-filled steel tube support is manufactured by adopting an prefabricated method, has the characteristics of quick assembly and the guaranteed of construction quality, can effectively release the pressure of surrounding rock at the same time, and can be widely applied to the supportand deformation control of underground engineering tunnels.

The present invention proposes a high-toughness composite beam and a construction method thereof, wherein the composite beam includes a SWCP-PVA-ECC tensile side protective layer, a grid layer arranged on the protective layer, a rubber material arranged on the grid layer, and a The reinforced concrete material layer on the rubber layer. It solves the problem that ceramic waste is not rationally utilized, and the production of cement will release a large amount of carbon dioxide into the environment, which will aggravate the greenhouse effect. The present invention replaces the existing ordinary concrete with SWCP-PVA-ECC material, which can enhance the shear resistance of beams, The flexural bearing capacity can improve the impermeability of the beam, thereby reducing the maintenance and repair times of the beam and prolonging its service life. In addition, SWCP (solid waste ceramic powder) is a recycled admixture. The recycling of SWCP can not only reduce environmental pollution, but also save costs and non-renewable resources.

The invention provides a mineral inorganic superfine foamed filling material. The mineral inorganic superfine foamed filling material is prepared from the following raw materials in parts by weight: 8 to 18 parts of sulphoaluminate cement, 25 to 40 parts of bentonite, 3 to 10 parts of pearlite, 30 to 45 parts of fly ash, 3 to 8 parts of a foaming agent and 0.3 to 1 part of a water reducing agent. The mineral inorganic superfine foamed filling material provided by the invention is used for reinforcing coal mine crushed gangues and loose coal-rock masses and filling a goaf, a roof falling zone and a roadside, and has the characteristics of capability of pumping in a long distance, rapid condensation, uneasiness of cracking, greenness and environment friendliness. The invention further provides a preparation method and an application method of the mineral inorganic superfine foamed filling material.