PURPOSE: A blast furnace slag composition for concrete is provided to produce ettringite hydrate by using the composition as an alkali irritant and oil refining desulfurization gypsum containing anhydrous gypsum and quicklime as an additive. CONSTITUTION: A blast furnace slag composition for concrete contains blast furnace slag, and 0.5-6 parts by weight of oil refining desulfurization gypsum, 0.1-5 parts by weight of sodium sulfate, 0.1-50 parts by weight of fly ash, and 0.1-5 parts by weight of slaked lime for 100 parts by weight of the blast furnace slag. The blast furnace slag composition additionally contains 0.1-5 parts by weight of quicklime for 100 parts by weight of the blast furnace slag. The oil refining desulfurization gypsum is a byproduct generated from combusting a mixture of 30-70 wt% of limestone and 30-70 wt% of petroleum coke at 800-900°C. The oil refining desulfurization gypsum contains quicklime as an alkali source, and anhydrous gypsum as a gypsum source.

Blast furnace slag composite for concrete with desulfurization gypsum formed in the petroleum refining

A method for manufacturing a color board for an interior material may include the steps of producing a composition by mixing a fiber reinforced plastic curing agent, a solidifying agent, stone flour sludge, and ceramic powder (for example, a mixture solution of a weight ratio of 1:1:1:1), producing a mixture by adding 5 to 20 weight part of inflammable Styrofoam granules as an additive to 80 to 95 weight part of the composition; stirring the mixture at room temperature to 50 degrees Celsius for 1 to 2 hours, injecting 50 weight part of the mixture into a mold; stacking a mesh net on the injected mixture; injecting 50 weight part of the remaining mixture into the stacked mesh net; and curing and separating the mesh net. A fiber reinforced plastic may be provided with physical characteristics of stone flour sludge by mixing stone flour sludge and the fiber reinforced plastic.

Color board for interior materials and manufacturing method thereof

The present invention relates to a nonplastic inorganic binder for filling and solidifying for ground reinforcement, a manufacturing method thereof, and a soil cover material produced by using the same. Specifically, the nonplastic inorganic binder for filling and solidifying for ground reinforcement comprises: 50-70 wt% of calcium aluminate-based slag produced in a second refining step of a steelmaking process and composed of 95 wt% or more of the total mount of C_12A_7 and C_3A; and 30-50 wt% of calcareous slag produced in a hot metal pretreatment step and composed of 50-70 wt% of Ca(OH)_2 and 5-20 wt% of unburned carbon existing in a kish carbon form. The calcium aluminate-based slag and the calcareous slag are mixed and ground into powder, and the mixed powder has a fineness degree of 3,500 cm^2/g or higher.

Nonfiring inorganic binder for filling up of ground reinforcement and solidification, manufacturing method thereof, and cover soil solidified by using thereof

The present invention relates to a pile grouting material including 100-300 wt part of blast furnace slag fine aggregates, and 100-300 wt part of gypsum containing at least 50 wt% of calcium oxide, and at least 15 wt% of sulfate oxide based on 100 wt part of ferronickel slag fine aggregates. According to the present invention, CaO and SiO_2 ingredients obtained by vitrificating ferronickel slag fine aggregates and granulated blast furnace slag are activated by alkali and sulphate stimulus of the gypsum including at least 50 wt% of calcium oxide, and at least 15 wt% of sulfate oxide at hydrogen ion concentration (pH) of 12 or more, so that strength equal to or greater than that of type I ordinary cement used as the pile grouting material can be obtained. In addition, according to the pile grouting material, end bearing capacity and skin friction of a bored pile can be more improved as compared with those of existing injected cement liquid by preventing injected liquid from leaking by underground water filled in a gap between a bored ground and an original ground and existing between bores and the bored pile through a volume expansion reaction in which at least 30 wt% of MgO ingredients contained in ferronickel slag fine aggregates meet water (H_2O) to change into Mg(OH)_2 to be expanded.

Pile grouting materials using ferronickel slag

The present invention relates to a hardener for effectively hardening and processing organic sludge such as sewer sludge, and to a method for manufacturing artificial soil using same, and more particularly, to an organic sludge hardener and to a method for manufacturing artificial soil using same, which use the effects of absorption, heat emission, and volumetric expansion of calcium oxide (CaO) contained in large amounts in paper sludge cinder and high calcium slag dust to reduce the water content in sludge having a high water content such as hydrous sludge and to manufacture artificial soil, and to additionally mix an acidic substance into the manufactured artificial soil to block the generation of an ammonia smell caused by high alkalinity and other bad smells at the source thereof The organic sludge hardener according to the present invention includes 10 to 200 parts by weight of a calcium slag powder which has a CaO content of 40 to 80%, with respect to 100 parts by weight of a paper sludge cinder which has a CaO content of 35 to 70%

Organic sludge hardener, and method for manufacturing artificial soil using same

PURPOSE: An organic sludge firming agent and a manufacturing method of an artificial soil using the same are provided to prevent odor and heavy metal elution by lowering the pH of biosoil by adding a pH lowering agent, to have an excellent absorption capacity and a high heat-generating temperature when in contact with moisture by using a high content of free-calcium oxide(CaO) and Iron(II) oxide(FeO) in high calcium slag dust from the evaporation of moisture by absorption and a heat generating reaction of CaO. CONSTITUTION: An organic sludge firming agent comprises 10-200 parts by weight of high calcium slag dust with 40-80% of Calcium oxide(CaO) content based on 100 parts by weight of paper sludge ash with 35-70% of CaO. The surface area of the paper sludge ash and high calcium slag dust is 2,000-9,000/g. The additional heat generating agent is included to increase a heat generating reaction of organic sludge. The heat generating agent is a compound with one or more of selected lime stone powder, light burning dolomite powder, and petrol cokes incinerate material powder. The 5-50 parts by weight of the heat generating agent are mixed based on 100 parts by weight of the paper sludge ash. The additional pH lowering agent is included to prevent odor and heavy metal elution of the solidified organic sludge.

Sludge solidified agent and menufacturing method of artificial soil usign the same

The present invention relates to an eco-friendly ground grout material eliminating the risk of heavy metal leaching and a ground grouting method using the same. More specifically, the eco-friendly ground grout material can utilize the bottom ash and fly ash discharged from a circulating fluidized bed boiler and a byproduct from a desulfurization process in a steel mill called sodium sulfate as a complex stimulant of alkali and sulfate salt to exercise the potential hydraulic properties of fine blast furnace slag powder. With respect to 100 parts by weight of the fine blast furnace slag powder, the ground grout material includes: 0.5-1,000 parts by weight of bottom ash from a circulating fluidized bed boiler having the CaO content of 15-70 wt% and SO_3 content of 3-30 wt%; 0.5-1,000 parts by weight of fly ash from a circulating fluidized bed boiler having the CaO content of 15-60 wt% and SO_3 content of 3-20 wt%; and 0.5-1,000 parts by weight of sodium sulfate, which is a byproduct from a desulfurization process in a steel mill, with the Na_2O content of 10-50 wt% and SO_3 content of 10-50 wt%.

Grouting agent and method

The present invention relates to a milk grouting material for bored pile construction, and more specifically, to a milk grouting material for bored pile construction, which can implement performance higher than a type one cement by using petroleum coke desulfurization plaster, cement, and an expansion agent to blast furnace slag powder to replace the type one cement, prevents loss of a milk solution caused by underground water existed between a perforated hole and a bored pile highly improving end bearing capacity and skin friction force of the bored pile compared to an existing cement milk solution. The milk grouting material for bored pile construction comprises: 5-200 parts by weight of petroleum coke desulfurization plaster having more than or equal to 50 wt% calcium oxide and more than or equal to 15 wt% of sulfate oxide; and 50-300 parts by weight of mixing water.

Composition for soft ground construction pile

The present invention relates to a surface layer mixing method and, more specifically, to a nontoxic surface layer mixing method without heavy metal elution by replacing type-1 normal cement most widely used in soft ground surface layer mixing and soil pavement construction. According to the present invention, the soft ground surface layer mixing method comprises: 1) a step of manufacturing a solidification agent including blast furnace slag powder, fluidized bed boiler bottom ash, petro cokes fly ash, and sodium sulphate; 2) a step of adding 5-200 parts by weight of the solidification agent to 100 parts by weight of soil; 3) a step of uniformly mixing the soil and the solidification agent; 4) a step of pouring and compacting the mixture of the soil and the solidification agent; and 5) a step of curing the mixture of the soil and the solidification agent.

Surface mixing method

PURPOSE: A solidifying agent is provided to obtain activate the solidifying strength by activating hydraulic property of a blast furnace slag and to remove pore water in an expansion agent by using a exothermic reaction and volume expansion function. CONSTITUTION: A solidifying agent comprises 20-50 parts by weight of petroleum cokes calcium sulfate and 40-100 parts by weight of an expansion agent based on 100.0 parts by weight of a blast furnace slag micropowder. The expansion material is one or a mixture of two more selected from a biomass incineration bottom ash, paper sludge incineration bottom ash, and RDF(Refuse Plastic Fuel) incineration bottom ash. The expansion agent contains 20-70% of calcium oxide(CaO).

Park Seong Soon

Papers

Sludge solidified agent and menufacturing method of artificial soil usign the same

Grouting agent and method

Composition for soft ground construction pile

Surface mixing method

Solidified agent to strengthen stratum