Abstract: Provided is an effective material age estimation device capable of appropriately taking relative humidity variation into consideration when estimating an effective material age. This effective material age estimation device comprises a temperature term calculation unit 13 for calculating a temperature term ?T dependent on the temperature of cast concrete, a humidity term calculation unit 14 for calculating a humidity term ?RH dependent on the relative humidity of the concrete, and an effective material age calculation unit 15 for calculating the effective material age of the concrete by summing products of the temperature term ?T, the humidity term, and a step time term ?ti. The humidity term ?RH is introduced, and the sum of the products is weighted using the term.

Abstract: A recyclable formwork adds a new function without destroying other functions of the recyclable formwork. The recyclable formwork includes a main unit including a contact surface contacting with cast concrete, a non-contact surface parallel and opposite to the contact surface, and a plurality of ribs projecting from the non-contact surface and reinforcing the main unit. A case is housed between the plurality of ribs and fixed on the non-contact surface. A circuit is stored in the case. A highest point of the case at the side of the non-contact surface is not higher than a highest point of upper ends of the plurality of ribs.

Abstract: A recyclable formwork can suitably detect temperature of concrete cast contacting with the formwork in a field without spoiling the other functions of the formwork. The recyclable formwork is provided with: a main unit (1) including a plurality of ribs (3) and (4); a case (7) being housed between the ribs (3) and (4), the case (7) being fixed on a non-contact surface (1a); and a circuit housed in the case (7). A through-hole (16) is opened at a position corresponding to where the case (7) is fixed, the through-hole (16) penetrating the main unit (1) from the non-contact surface (1a) to a contact surface (2). A sensor-housing case (17) is provided with a lower portion of the case (7), the sensor-housing case (17) being inserted into the through-hole (16), a bottom face of the sensor-housing case (17) facing concrete. And, a concrete temperature-detecting sensor (19) for detecting surface temperature of the concrete is housed in the sensor-housing case (17).

Abstract: A recyclable formwork can suitably detect temperature of concrete cast contacting with the formwork in a field without spoiling the other functions of the formwork. The recyclable formwork is provided with: a main unit (1) including a plurality of ribs (3) and (4); a case (7) being housed between the ribs (3) and (4), the case (7) being fixed on a non-contact surface (1a); and a circuit housed in the case (7). A through-hole (16) is opened at a position corresponding to where the case (7) is fixed, the through-hole (16) penetrating the main unit (1) from the non-contact surface (1a) to a contact surface (2). A sensor-housing case (17) is provided with a lower portion of the case (7), the sensor-housing case (17) being inserted into the through-hole (16), a bottom face of the sensor-housing case (17) facing concrete. And, a concrete temperature-detecting sensor (19) for detecting surface temperature of the concrete is housed in the sensor-housing case (17).

Abstract: There is disclosed to provide a recyclable formwork that can add the new function without spoiling the other functions of the recyclable formwork. The recyclable formwork includes: a main unit including a contact surface contacting with cast concrete, a non-contact surface being parallel and opposite to the contact surface, and a plurality of ribs outstanding from the non-contact surface to a side opposite to the non-contact surface and reinforcing the main unit; a case being housed between the plurality of ribs and being fixed on a side of the non-contact surface; and a circuit being stored in the case. A first highest point of the case at the side of the non-contact surface is not higher than a second highest point of upper ends of the plurality of the ribs.

Abstract: There is provided a temporary post joint for remarkably shortening the term of works while maintaining high flexibility of slab-designing. The temporary post joint is used in a temporary structure comprising a first temporary post (2), and a second temporary post (5) arranged in a higher floor. The temporary post joint comprises: a bottom face formed connectable to an upper end portion (2b) of the first temporary post (2); and a top face formed connectable to a lower end portion (5a) of the second temporary post (5). The temporary post joint connects the first and second temporary posts (2 and 5) in a vertical direction, and the temporary post joint is formed operable to engage with arranged reinforcing bars and is integrally held within a slab even after cast-in-place concrete contacting with the reinforcing bars has hardened and solidified. It is possible to harden and solidify cast-in-placed concrete of the higher and lower floors concurrently in parallel, thereby remarkably shortening term of works.

Abstract: Disclosed is an ammonia adsorption apparatus for removing ammonia contained in a treated gas discharged from a denitrator for decomposing nitrogen oxides present in exhaust gas using ammonia as a reducing agent, comprising at least two adsorption towers into which ammonia-containing exhaust gas is introduced in a vertical direction for removing the ammonia by adsorption, wherein, during regeneration of each adsorption tower, hot gas used for desorption purposes flows from a top toward a bottom of the adsorption tower and cooling gas flows from the bottom toward the top of the adsorption tower.

Abstract: The object of the present invention is to provide a device to make flow uniform in a denitrification system, which can achieve a predetermined flow regulation effect with low pressure loss independently of the gas flow rate. According to the present invention, the device installed on the upstream side of a chemical injection means for the denitrification system is composed of at least one perforated plate 11, and the perforated plate 11 can be turned by a rotating shaft 10 or 10a from the closed position where the gas flow path is closed to the open position where the gas flow path is opened or vice versa.

Abstract: A high-performance rectifying device promotes the diffusion of energy, temperature and concentration in a fluid stream with a small pressure loss. The device is a lattice type rectifying device provided within a fluid flow passageway for equalizing the flow velocity distribution of the same fluid. Lattice elements each consist of two triangular plates disposed so as to form two opposed surfaces of a pyramid having its apex on the downstream side of the fluid flow and two other triangular plates forming two opposed surfaces of another pyramid having its apex jointed with the first-mentioned apex and having its bottom surface positioned on the downstream side of the fluid flow. The latter two opposed surfaces have their orientations deviated by 90 degrees from the two opposed surfaces on the upstream side.