191 results about "Cement board" patented technology

The invention discloses a white and black pavement structure exterior and interior disease one-key plotting method oriented to pavement health management, and relates to the technical field of road engineering detection and maintenance. Reflection crack tracing is realized based on an interlayer disease conduction rule by establishing a cement board joint coordinate system; the method comprises the following steps: determining the types of broken slabs and slab corner fractures by utilizing the spatial geometrical relationship between cracks and joints, calculating indexes such as a load transfer coefficient, a reflection crack rate, a slab breakage rate and a pavement condition index, and generating a visual result containing disease distribution and performance parameters in a linkage manner. According to the method, the traditional single structure layer analysis limitation is broken through, the reflection crack recognition accuracy rate exceeds 92%, the broken plate judgment accuracy rate reaches 94% or above, the batch data processing time complexity is optimized to O (n + m), the single road section analysis time is shortened to be within 5 minutes from 2 hours, the problems of low manual detection efficiency, large errors and the like are effectively solved, and quantitative support is provided for precise maintenance of white and black pavements.

The invention discloses integrated forming equipment for an assembled composite insulation board, which comprises a grid cutting device, a grid pressing device, an insulation board feeding device and an insulation board bearing device, and the insulation board bearing device is arranged at the lower end of one side of the insulation board feeding device; the grid cutting device, the grid pressing device and the insulation board feeding device are arranged on the same horizontal line, a first supporting frame is arranged at the lower end of the grid cutting device, the lower end of the grid pressing device and the lower end of the insulation board feeding device, a conveying belt is arranged at the upper end of the first supporting frame, and a plurality of cement board bearing boxes are arranged at the upper end of the conveying belt, made of soft materials and used for cyclic conveying on the conveying belt. The conveying belt is an ultra-long production line and is used for drying and processing the insulation board by adopting drying equipment subsequently; the device has the advantages that automatic operation is adopted, personnel operation is reduced, the traditional operation needs multiple persons to carry out manual placement operation at multiple stations, the placement size and precision cannot be guaranteed, and meanwhile, shutdown adjustment needs to be carried out when a problem occurs slightly.

The utility model discloses a laminated slab strip reinforcing structure which comprises an ejector rod, the bottom of the middle end of the ejector rod is fixedly connected with a lead screw, the outer side of the lead screw is provided with threads and is in threaded connection with a fastening nut, and the ejector rod is arranged above a gap between two laminated slabs. The screw rod penetrates through the wood glue plate arranged below a gap between the two laminated plates and is in sliding connection with the wood glue plate, cement cushion blocks are arranged between the lower portions of the two ends of the ejector rod and the tops of the laminated plates, the screw rod is sleeved with a sleeve, and the sleeve is in sliding connection with the screw rod. The ejector rod is made to be higher than the pouring face of concrete, the screw rod is sleeved with the sleeve, the screw rod and the concrete are separated, the screw rod and the ejector rod can be taken down conveniently after pouring is completed, cost can be saved through recycling, and the working procedure of cutting protruding parts is omitted.

The utility model relates to the technical field of cement sampling, and discloses a cement sampling device. The cement sampling device comprises a connecting pipe, a baffle is fixedly installed in the connecting pipe, an adapting pipe is fixedly installed below the connecting pipe, a fixing frame is fixedly installed in the adapting pipe, a fixing pipe is fixedly installed in the center of the fixing frame, a piston is installed in the fixing pipe in a penetrating and inserting mode, and the connecting pipe is fixedly installed in the connecting pipe. A plug is fixedly installed at the top end of the piston, a conveying pipe is fixedly installed below the adapting pipe, the plug is movably connected with the fixing pipe through the piston, the plug is made of rubber and of a conical structure, the diameter of the bottom end of the plug is larger than the outer diameter of the fixing pipe, and the plug is located under the opening structure of the connecting pipe. The plug is driven by the piston to move upwards, so that the plug penetrates through the opening structure at the bottom of the connecting pipe, a cement board structure blocked at the opening structure of the connecting pipe is damaged, and cement is prevented from blocking the sampling hole.

This invention discloses a solid waste cemented board sound barrier and its preparation method. The solid waste cemented board sound barrier material is prepared from industrial solid wastes such as phosphogypsum, steel slag powder, and fly ash as the main raw materials, realizing the resource utilization of solid waste, significantly reducing raw material costs, and being environmentally friendly and low-carbon. The board production process has low energy consumption, simple and controllable technology, and is easy to mechanize for continuous production. The resulting material has high strength and stable performance, and is lightweight, fireproof, and corrosion-resistant. It does not crack or discolor under extreme climates, and its key indicators meet the requirements of highway sound barrier specifications. Based on its excellent strength, the solid waste cemented board sound barrier board prepared by this invention can be made into 4-5 meter long boards, suitable for installation with H-shaped steel columns spaced 4-5 meters apart. Compared with the traditional 2-meter boards, it can reduce the amount of column and foundation engineering, significantly reduce the overall cost, and has significant economic benefits and broad application prospects.

The present invention discloses a method for manufacturing UHPC components, which includes the following steps: (1) CNC foam mold carving: using CNC carving technology to realize the production of two foam molds in a 1:1 ratio of the template, one piece is processed to achieve a smooth surface of the foam mold, including visible seam strips, and is used for bottom mold remaking. The other piece is processed to achieve a smooth surface and is used for closing the cover plate; (2) cement board seed mold production: because the front texture of the template is a fine lychee surface (rough surface), the cement board is produced on the foam mold that requires bottom mold remaking using GRC technology, and after demoulding, the surface texture is achieved by sandblasting technology to achieve a rough surface effect. This method can ensure the accuracy and aesthetics of the component thickness and obtain a good double-sided effect. The surface texture is achieved through a silicone texture mold, the component is formed in one step, and the durability of the surface is guaranteed, solving the problems of insufficient compressive strength of UHPC, uneven settlement of the incorporated steel fiber, cracking of prefabricated products, and poor working performance of UHPC.

The utility model relates to a concrete pouring and tamping device for multifunctional classroom floor honeycomb core construction, and belongs to the technical field of concrete pouring and tamping devices, the concrete pouring and tamping device comprises two supporting rods and a tank body, the left and right sides of the lower surfaces of the two supporting rods are provided with supporting legs, and the left sides of the upper surfaces of the supporting rods on the front and rear sides are provided with connecting plates; a driving mechanism is arranged on the right side of the connecting plate, a stirring mechanism is arranged on the upper surface of the tank body, and the left side of the upper surface of the tank body communicates with a feeding pipe. According to the multifunctional concrete pouring and tamping device for classroom floor honeycomb core construction, an electric push rod is started to drive a tank body to move left and right, moving blocks slidably connected to front and rear U-shaped rods move left and right on the outer sides of the front and rear U-shaped rods, and the position of the device and the pouring position can be adjusted; and the effect of pouring cement boards of different sizes is achieved, and then the position on the supporting rod can be conveniently adjusted.

The invention relates to the technical field of prefabricated structural parts, and particularly discloses a prefabricated butt joint steel structure which comprises a wall body, corner fixing frames are arranged at the corners of the wall body, cement board bodies are arranged on the two sides of the wall body, fixing devices are arranged at the two ends of each cement board body, clamping grooves are vertically formed in the corner fixing frames, and the fixing devices are arranged in the clamping grooves. Connecting grooves are formed in the front side and the rear side of the inner surface of the clamping groove, and the two ends of the cement board body are inserted into the clamping grooves in the corner fixing frames through fixers to be connected and fixed. The fixator comprises a built-in groove, a clamping block, an extrusion block, a connecting piece, a rotating shaft, a connecting strip, a first movable groove, a second movable groove, a butt joint groove, a bumper and a buffer assembly. The structure can prevent a large amount of rainwater from being injected, reduces corrosion damage caused by residual rainwater in the fixer, protects the cutting end of the cement board main body, prevents water from entering the cement board main body to corrode and damage the cement board main body, and prolongs the service life of the device structure.

The utility model discloses a light floor support plate combining a strong rib steel mesh cement plate and a steel bar truss, which relates to the technical field of building materials and comprises a bottom plate, the steel bar truss and a limiting mechanism, a steel mesh is arranged in the bottom plate, a steel plate is arranged on the bottom plate, a mounting groove is formed in the steel plate, a guide groove is formed in the inner wall of the mounting groove, and the steel mesh cement plate is arranged in the guide groove. The limiting mechanism comprises a limiting block, a telescopic rod and a spring, the limiting block is connected into the guide groove in an embedded mode, and one end of the telescopic rod is fixedly connected to the inner wall of the guide groove. By arranging the limiting mechanism, the steel bar truss can be rapidly installed through the limiting effect exerted on the fixing block by the limiting mechanism, the overall operation is simple and convenient, the installation efficiency of the steel bar truss can be effectively improved, and the installation efficiency of the steel bar truss is improved by installing the steel bar truss in the mode. The problem that the installation effect is affected by deviation of the steel bar truss is solved, and the overall practicability is high.

The utility model provides a basement exterior wall integrated formwork, which belongs to the technical field of formworks and comprises an anti-corrosion frame, a cement board protective layer, a thermal insulation layer, a waterproof layer and a cement filling board are sequentially arranged in the anti-corrosion frame, a quick connection upper containing board is arranged on the anti-corrosion frame, and a quick connection lower raised head is arranged at the bottom of the anti-corrosion frame. A left connecting plate and a right connecting clamping plate are arranged on the anti-corrosion frame, protective outer nets are arranged on the two sides of the anti-corrosion frame, a plurality of sets of arc-shaped grooves are formed in the heat preservation layer, a plurality of sets of aluminized reflecting films are arranged on the arc-shaped grooves, the waterproof layer is sleeved with an expansion water stop strip, and a plurality of sets of breathable isolation cotton are clamped on the waterproof layer. According to the device, a polystyrene foam board with the thickness of 80-120 mm is adopted as the heat preservation layer, a plurality of sets of arc-shaped grooves with aluminized reflecting films are formed in the heat preservation layer, an ethylene waterproof roll with the thickness of 1.2-1.5 mm is selected as the waterproof layer, and an expansion water stop strip is arranged in a sleeving mode, so that a user can obtain heat preservation and waterproof performance.

The utility model belongs to the technical field of production of building materials, particularly relates to raw material proportioning equipment for processing heat-preservation and sound-insulation materials, and provides the following scheme aiming at the problems that the conventional tool for weighing the raw materials is low in automation degree, troublesome to operate and inconvenient to use: the raw material proportioning equipment comprises a bottom plate, the proportioning equipment comprises a bottom plate, four stand columns are symmetrically and fixedly installed at the top of the bottom plate, the same supporting frame is fixedly installed at the top ends of the four stand columns, a baffle is fixedly installed at the bottom of the supporting frame, the proportioning equipment further comprises a discharging mechanism, the discharging mechanism is installed on the supporting frame, and the discharging mechanism is used for containing raw materials for manufacturing foaming cement boards. According to the utility model, various raw materials can be automatically weighed, and the weighed materials can be moved out after the weighing is completed, so that the labor intensity of weighing the raw materials can be greatly reduced when the foaming cement board is produced, and the foaming cement board weighing device has good practicability.

This application relates to a construction method for splicing joints between new and old roadbed base courses, belonging to the technical field of new and old roadbed splicing construction. It includes the following steps: S1: Marking the location of the road splice joint; S2: Removing the cement slab within the shoulder area of ​​the old road surface and laying an asphalt layer on top; S3: Excavating steps at the joint of the old road surface to facilitate lateral splicing with the new road surface; S4: Laying a subbase and base course; S5: Pouring a concrete layer at the joint between the new and old road surfaces and reinforcing it with a reinforcement mechanism to improve the connection strength between the new and old road surfaces; then laying the base course; S6: Laying the asphalt surface course. This application has the effect of extending the service life of the old road surface.

The invention relates to the field of building materials, in particular to a light-weight high-strength prefabricated cement board material based on industrial solid waste recycling and a preparation method of the light-weight high-strength prefabricated cement board material. The invention relates to a lightweight high-strength prefabricated cement board material based on industrial solid waste recycling. The raw materials comprise ordinary Portland cement, active slag powder, ash, a reinforced fiber composition, a composite functional agent, water and the like. According to the cement board material provided by the invention, through scientific compatibility of various industrial solid wastes, efficient utilization of resources and environmental protection are realized, and meanwhile, by virtue of a unique organic polymer composite additive system, the internal structure of the material is remarkably improved, the mechanical property of the board is effectively enhanced, and on the basis of keeping the lightweight characteristic, the cement board material has a good application prospect. Excellent fracture resistance and crack resistance are obtained, long-term use durability and dimensional stability are ensured, and the composite material is suitable for the field of prefabricated building components with high requirements for performance.

The invention relates to a desert-to-forest cement grid hole one-tree one-hole method. The method is characterized in that a'desert global bulldozing type 'cement flat ground or a'desert ladder bulldozing type' cement flat ground (the'desert ladder bulldozing type 'cement flat ground is similar to a terraced field) is constructed in the global or partial area of the super large desert (such as the Taxlamay desert), a plurality of'cement grid holes' are formed in the cement flat ground, and each tree occupies one hole; all the cement holes are solidified into cement plate connected holes (instead of isolated holes of a bean curd plate) by means of a reinforced concrete pouring method; the cement plate blocks can protect underground root systems of thousands of old trees like a mountain so as to stand still (the situation that the old trees cannot stand when the old trees are too tall); a cement bank is arranged on the outermost periphery of the cement flat ground so as to realize a shallow-bottom cement pond (super sightseeing forest park) in which fishes are welcomed under green shade trees and hang; alternatively, when people walk on the wet land, the foot sole does not collapse (a super insurance type forest park), and even if a pit or collapse exists underground, cement on the ground is still firm and flat (so that the flood control level is improved to one hundred years or thousands of years).

To provide treads and the like that can prevent corrosion of reinforcing materials and prevent insufficient strength. [Solution] The step board 5A according to the present invention is a step board comprising a rectangular molded cement board 51, a reinforcing material 52, and a moisture intrusion prevention material (backup material 81, 82, sealing agent 83), wherein the molded cement board 51 has a plurality of hollow portions 53 that are continuous across the left and right end faces and are provided at predetermined intervals along the front-rear direction of the molded cement board 51, the reinforcing material 52 is formed to a length shorter than the length of the hollow portions 53 formed in the molded cement board 51 and is installed in one or more hollow portions 53, and the moisture intrusion prevention material is provided between the outer peripheral surface 52s of the end of the reinforcing material 52 installed in the hollow portion 53 and the inner peripheral surface 53u of the end of the hollow portion 53.

The utility model discloses a fiber reinforced cement board carrying device, and relates to the technical field of building board carrying, the fiber reinforced cement board carrying device comprises a bearing frame and a rotating shaft, the rotating shaft is rotatably arranged on the bearing frame, and the outer side of the rotating shaft is fixedly provided with a bearing piece used for supporting a cement board; and the positioning piece is arranged at one end of the rotating shaft to limit the rotating angle of the rotating shaft, so that the bearing piece is in a stable state. The cement board is placed on the bearing part, under the cooperation of the limiting baffles, the cement board is fixed, then transportation of the cement board in a small space is facilitated, the included angle between the bearing part and the horizontal plane is changed by controlling the rotating angle of the rotating shaft, and therefore the included angle between the cement board and the horizontal plane can be conveniently adjusted; and then discharging of the cement boards can be conveniently controlled.

The invention discloses a competition swimming pool external corner reinforcing structure and a construction method, belongs to the technical field of swimming pool construction, and aims at solving the technical problems that a traditional swimming pool external corner is prone to cracking and water seepage, the reinforcing structure is single, and real-time monitoring is lacked. The construction method comprises the following steps: prefabricating the L-shaped composite reinforcing unit containing the modified EVA buffer layer, the galvanized steel plate, the elastic epoxy bonding layer, the reinforced cement plate and the pre-embedded fiber grating sensor; the swimming pool concrete inner wall of the pre-embedded external corner cold-rolled ribbed reinforcing mesh is poured; a polymer cement mortar leveling layer with external corners pressed into fillets and a polyurethane waterproof coating and SBS coiled material double-layer waterproof layer are constructed; the L-shaped composite reinforcing unit is embedded through laser positioning, a seam is sealed, and a sensor is debugged; and the waterproof mortar layer and the anti-skid ceramic tile surface layer are constructed. The anti-seepage, anti-impact and anti-fatigue capacities are improved through a multi-layer cooperative reinforcing system, active protection is achieved in combination with real-time stress monitoring, the service life of the external corner of the competition swimming pool is effectively prolonged, and the method is suitable for construction of professional competition swimming pools.

This utility model discloses an automatic cutting device for cement board reinforced fiber mesh, including a worktable, a fiber mesh roll frame on one side of the worktable, and transverse moving devices on both sides of the worktable. A gantry mounting frame is provided on the top of the transverse moving devices. A rack and a first linear guide rail are respectively installed on the top and one side of the gantry mounting frame. An L-shaped mounting frame is slidably connected to one side of the first linear guide rail. A first servo motor is horizontally installed on the top of the L-shaped mounting frame. A gear is connected to the output end of the first servo motor, and the gear meshes with the rack. A second servo motor is vertically installed on the top of the L-shaped mounting frame. The output end of the second servo motor passes through the L-shaped mounting frame and is connected to a first flange mounting plate. A first cylinder is installed at the bottom of the first flange mounting plate. A second flange mounting plate is installed at the output end of the first cylinder. A cutting motor is installed at the bottom of the second flange mounting plate. A cutting tool is detachably connected to the output shaft end of the cutting motor.

The utility model provides an integrated fiber composite thermal insulation wallboard, which belongs to the technical field of building wallboards and comprises a thermal insulation layer, a metal frame and two fiber cement boards, the two fiber cement boards are respectively arranged on the upper surface and the lower surface of the metal frame to form a sandwich structure, and the thermal insulation layer is arranged on the inner side of the metal frame. The side length of the fiber cement board is larger than that of the metal frame, the center of the fiber cement board and the center of the metal frame are overlapped, and the edge of the fiber cement board and the edge of the metal frame form a sandwich type rabbet type clamping groove. The square metal frame is arranged, the square metal frame and the fiber cement board are integrally formed, when the fiber cement board and the metal frame are connected, connection is conducted in the mode that the metal frame is welded to the square metal frame, and the sealing performance between the metal frame and the fiber cement board is improved; moisture in air is prevented from entering the thermal insulation layer in the metal frame, a fireproof thermal insulation material in the thermal insulation layer is prevented from absorbing moisture, and the thermal insulation performance of the thermal insulation layer is guaranteed.

A production line (10) and a process including a movable carrier frame (14) for transporting the panel, and a device (93) for controlling the thickness of a fiber-reinforced cementitious panel grout formed, but not yet set, on the frame. The thickness control device (93) may include an angled rigid plate (95) for contacting a downstream end (202) of the angled plate (95) with the grout on the movable carrier frame (14) and a mounting bracket (97) for mounting the angled rigid plate (95). The thickness control device (93) may also include a flat horizontal plate (201) at a fixed height above the movable carrier for contacting the entire underside surface of the horizontal plate (201) with a coating (444) in the grout on the movable carrier frame (14).Or, the thickness control device (93) may include the angled plate (93) and include the horizontal plate (201) that comes into contact with the coating (444).

The utility model provides a pile cap brick tire film structure which is characterized in that a second concrete cushion layer is laid at the bottom of a foundation pit, prefabricated cement bricks are piled at the edge of the second concrete cushion layer, prefabricated cement plates are piled at the upper ends of the prefabricated cement bricks, and steel pulling pieces are arranged between the adjacent prefabricated cement plates in the horizontal wind direction. And self-tapping screws are arranged at the two ends of the steel pulling piece in a penetrating mode and matched with the prefabricated cement board. The prefabricated cement boards are used for replacing original prefabricated cement bricks, the construction speed and the overall stability of the brick blank film can be improved, and in addition, the connection strength between the prefabricated cement boards is ensured through the fixing mode of the steel pulling pieces and the self-tapping screws.

The application discloses a construction method for improving the strength of fiber reinforced cement boards and relates to the field of building construction; the construction method for improving the strength of fiber reinforced cement boards effectively solves the problems of easy loosening, edge warping and deformation of the board under the traditional single-board fixing mode, significantly improves the overall connectivity of the board and the keel and the anti-deformation capacity of the wall, and forms a double-board cooperative stress structure by connecting long U-shaped steel to the inner side of the fiber reinforced cement board joint and by jointly restraining the edges of the adjacent boards on the keel; meanwhile, the water-resistant flexible putty is filled and pressed into the glass fiber mesh belt at the joint of the outer board, which not only can offset the joint stress of the fiber reinforced cement board caused by dry shrinkage, wet expansion and temperature change, prevent the putty layer from cracking and rainwater leakage, but also avoids forming a rigid filling layer to hinder the normal pressure relief of the wall.

A 220kV line transmission tower anti-settlement pile foundation relates to a transmission tower anti-settlement pile foundation, and comprises a cement pile and a cement board, the upper end of the cement pile is provided with a reducing column head, the upper end of the column head is provided with a steel plate, and the upper end face of the steel plate is provided with a fixing screw rod connected with a quadrilateral iron tower; a sleeve is arranged in the middle of the cement board, and a plurality of tamping holes are formed between the periphery of the sleeve and the edge of the cement board; the sleeve hole of the cement plate sleeve is sleeved on the column head at the upper end of the cement pile; the upper end of the sleeve is fixedly connected with the outer edge of the steel plate; the cement board is fixedly connected with the column head at the upper end of the cement pile, the cement pile can play a good anti-settling role when the pile foundation settles, gravel blocks can be put into the tamping holes formed in the cement board and tamped when the pile foundation settles, and the repairing effect is achieved when the pile foundation settles.

The invention discloses an extrusion-molded carbon mineralized fiber cement board and a preparation method thereof, and the preparation method comprises the following steps: dispersing fibers, a plasticizer, a lubricant and a dispersant in water to obtain a fiber suspension; adding powder containing the calcium silicate ore phase into the fiber suspension, and kneading into plastic pug; aging the plastic pug, performing vacuum pugging, and performing vacuum extrusion molding to obtain a fiber cement board blank; and drying and pre-curing the fiber cement board blank, and then carrying out CO2 curing to obtain the carbon mineralized fiber cement board, the raw material formula is simple, the powder with high carbonization activity and low hydration activity is adopted as a gelling component, so that the plasticity of the pug is stable, fibers are uniformly dispersed, and the production efficiency and the product performance of the fiber cement board prepared by an extrusion molding process are remarkably improved by combining normal-temperature and normal-pressure CO2 curing.

The explosion venting wall comprises an inner cement board, a keel frame and an outer cement board, the inner cement board and the outer cement board are laid on the inner side wall and the outer side wall of the keel frame respectively, the outer cement board is located on the outer side of the explosion venting wall, and the outer wall of the outer cement board is covered with the veneer. And the veneer is prefabricated in a factory and compounded on the outer surface of the outer cement board. According to the explosion venting wall with the veneer, independent construction of the outer veneer of the explosion venting wall is omitted, and the construction period is shortened.

This utility model relates to the field of building facade reinforcement technology and discloses a wall insulation reinforcement mechanism. The mechanism includes a cement board with a cement adhesive for connection to the building wall on one side. An anti-deformation mechanism is also provided on one side of the cement board via an anchoring component. The anti-deformation mechanism includes two sets of extruded polystyrene (XPS) insulation boards on one side of the cement board. The XPS insulation boards have installation grooves on their outer sides, with trapezoidal cross-sections. After installing the two sets of XPS insulation boards, a polyurethane foaming agent is sprayed to fill and seal the joints. When temperature changes cause thermal expansion and contraction of the XPS insulation boards and shape memory polyurethane sealing strips, the deformation cavity within the shape memory polyurethane sealing strip provides buffering, preventing rigid compression cracking. The polyurethane foaming agent can slightly expand and contract to maintain the seal, solving the problem of joint cracking caused by temperature deformation of the insulation board.

The utility model provides a noise reduction cement board structure for temporary pavement protection, and relates to the field of temporary pavement protection. Comprising a cement board body, a plurality of first noise reduction holes are symmetrically and evenly formed in the two sides of the cement board body, sound absorption boards are fixedly connected to the inner walls of the first noise reduction holes, and second noise reduction holes are symmetrically formed in the lower portions of the two sides of the cement board body. According to the noise reduction cement board structure for temporary protection of the road surface, when a vehicle passes through the cement board main body, a buffer slope composed of a plurality of buffer blocks reduces shaking generated when the vehicle passes through the buffer slope, noise generated by the buffer slope is reduced, and noise generated by the upper portion of the cement board main body is absorbed through a sound absorption board in a first noise reduction hole; noise generated by shaking below the cement board main body is transmitted into the slotting opening through the second noise reduction holes and the sliding grooves, and the cement board main body is fixed in the slotting opening through the fixing assemblies, so that the stability of the cement board is improved, shaking generated when vehicles pass by is reduced, the noise generated when the cement board is used is reduced, and noise pollution is reduced.

The present invention is directed to processes for making cementitious construction material, in particular magnesium oxychloride (MOC) cementitious construction material (e.g., MOC boards). The processes relate to one or more operations of the overall material production process, including material storage and handling, mixing of materials, curing to form magnesium oxychloride cement, board handling, and / or packaging. Various processes of the present invention involve process control strategies and / or algorithms to provide improved processes for producing construction material. In particular, the processes of the present invention provide improvements in board properties as detailed below (e.g., racking strength), speed of board production, economics of board production, reduction in complexity of manufacture, improvements in consistency of board manufacture, and improvements in quality control.

A method for assembling a wall system to retrofit an existing panel and frame building assembly for a wall, floor or roof, including providing a sound damping building panel including a dense, fiber-reinforced, structural cementitious panel of fiber-reinforced cement, the dense, fiber-reinforced, structural cementitious panel having a first surface opposed to a second surface, and a layer of acoustic dampening material on the first surface of the dense, fiber-reinforced, structural cementitious panel; attaching the sound damping panel to an existing building panel attached to an existing frame for a wall, floor or roof, the existing building panel having an interior surface facing the frame and an exterior surface opposed to the interior surface. This locates the layer of acoustic dampening material between the exterior surface of the building panel and the first surface of the sound damping panel. A sound damping building panel is also provided.

The invention relates to the technical field of formwork construction devices, in particular to a non-dismantling formwork construction device and process for a constructional column. According to the technical scheme, the mounting structure comprises a steel framework, a fiber cement board fixedly mounted on the steel framework and a mounting device for mounting the fiber cement board, and further comprises a plurality of connecting blocks which are fixedly mounted on the steel framework and provided with threaded holes, a plurality of kidney-shaped holes corresponding to the threaded holes are formed in the fiber cement board, and the mounting device comprises a base. According to the device, a fiber cement board can freely move in three directions in a three-dimensional space, hole positions in the fiber cement board can be conveniently adjusted, after the fiber cement board is adjusted, the fiber cement board can be fixed, the fiber cement board can be prevented from shifting when bolts are installed, and the installation efficiency of the fiber cement board is improved. The fiber cement board can be conveniently and finely adjusted, and the difficulty during screw mounting is greatly reduced.