摘要:
To provide shrinkage reducing agents which render excellent shrinkage reducing effect and frost-thaw resistance to cement compositions such as mortar and concrete without entraining excessive air, and exhibit excellent solution stability.The shrinkage reducing agent comprises a (poly)alkylene compound having an unsaturated bond represented by the formula (1): R2O—R1—O-(A1O)n—R3 (1) -(A2O)m—R4 (2) (wherein R1 is a C2-10 hydrocarbon group having an unsaturated bond; R2 is hydrogen or the formula (2); R3 and R4 are each independently hydrogen or a C1-8 alkyl group; A1O and A2O are one or more kinds of C2-4 oxyalkylene groups; and n and m are mean addition numbers of moles of A1O and A2O, respectively, and 1 to 20).
摘要:
To provide shrinkage reducing agents which render excellent shrinkage reducing effect and frost-thaw resistance to cement compositions such as mortar and concrete without entraining excessive air, and exhibit excellent solution stability.The shrinkage reducing agent comprises a (poly)alkylene compound having an unsaturated bond represented by the formula (1): R2O—R1—O-(A1O)n—R3 (1) -(A2O)m—R4 (2) (wherein R1 is a C2-10 hydrocarbon group having an unsaturated bond; R2 is hydrogen or the formula (2); R3 and R4 are each independently hydrogen or a C1-8 alkyl group; A1O and A2O are one or more kinds of C2-4 oxyalkylene groups; and n and m are mean addition numbers of moles of A1O and A2O, respectively, and 1 to 20).
摘要:
To provide cement additives which render high fluidity and the retention thereof, excellent shrinkage reducing effect and frost-thaw resistance to cement compositions such as mortar and concrete without entraining excessive air, and exhibit excellent solution stability.The present cement additives contain alkenyl group-containing polyalkylene compounds (SR), ester-based polycarboxylic acid copolymers (PC1) and ether-based polycarboxylic acid copolymers (PC2).
摘要:
To provide cement additives which render high fluidity and the retention thereof, excellent shrinkage reducing effect and frost-thaw resistance to cement compositions such as mortar and concrete without entraining excessive air, and exhibit excellent solution stability.The present cement additives contain alkenyl group-containing polyalkylene compounds (SR), ester-based polycarboxylic acid copolymers (PC1) and ether-based polycarboxylic acid copolymers (PC2).
摘要:
To provide shrinkage reducing agents which render excellent shrinkage reducing effect and frost-thaw resistance to cement compositions such as mortar and concrete without entraining excessive air, and exhibit excellent solution stability.The shrinkage reducing agent comprises a (poly)alkylene compound having an unsaturated bond represented by the formula (1): R2O—R1—O-(A1O)n—R3 (1) -(A2O)m—R4 (2) (wherein R1 is a C2-10 hydrocarbon group having an unsaturated bond; R2 is hydrogen or the formula (2); R3 and R4 are each independently hydrogen or a C1-8 alkyl group; A1O and A2O are one or more kinds of C2-4 oxyalkylene groups; and n and m are mean addition numbers of moles of A1O and A2O, respectively, and 1 to 20).
摘要:
A multi-functional cement dispersant contains a graft copolymer obtained by a graft reaction of one or more selected from polyoxyalkylene monoalkylester, polyoxyalkylene monoalkylether and polypropyleneglycol of specified kinds to a copolymer obtained by radical polymerization of a mixture of radical polymerizable monomers containing maleic anhydride and monomers of a specified kind at a specified ratio. Hydraulic cement compositions produced with such a multi-functional cement dispersant have a superior fluidity with reduced loss over time and hardened objects produced from such a composition exhibit a superior early strength and have a low dry shrinkage and a high resistance against freezing and thawing.
摘要:
An assembling method for an assembly is provided: the assembly comprising a cell structure (1) housed and held in a metal vessel (5) via a compressible material having a cushioning property (7) by arranging it between outer periphery of the structure (1) and the vessel (5) in a compressed state with applying a mounting pressure to the structure (1) via the material (7) to hold the structure (1) in the vessel (5). Information regarding outside dimension of the structure (1) and/or inside dimension of the vessel (5) being marked on their surfaces prior to the start of assembly, and the information is read, and a cell structure (1) and a metal vessel (5) are selected based on read information in assembly to achieve a proper holding condition therebetween. Regardless of variations in external dimension of the structure, etc. constituting the assembly, the minimization thereof, and proper holding state may be achieved easily without causing a fracture of the structure, etc.
摘要:
The present invention quickly resolves troubles in an analyzer and performs effective external quality control management. An analyzer (2) and a control device (1) are connected by a network (3). Error data and sample data taken from assay of a quality control substance are transmitted from the control device (1) to the analyzer (2). The analyzer (2) is made to be remotely operable from the control device (1) and when troubles arise repair from the control device (1) is possible. The control device (1) tallies sample data, and provides the tally results to a Web page. The analyzer (2) accesses the Web page using a WWW browser, and can perform external quality control in real time.
摘要:
A defoaming agent for cementitious compositions is provided, which has an excellent defoaming performance and does not segregate when mixed with a high performance AE water-reducing agent to form a single admixture or when diluted in water at the desired concentration, and which has excellent long term storage properties. The defoaming agent for cementitious compositions is obtained by mixing at least a polyethylene oxide derivative and a nonionic defoaming agent wherein the polyethylene oxide derivative has at one end a hydrophobic group with a branched structure and/or an unsaturated bond and at the other end an anionic group.
摘要:
A clinical laboratory management system is described that includes an analyzer for analyzing a sample, and a management apparatus connected to the analyzer. The management apparatus includes (a) a storage means for storing a result of an assay output from the analyzer, analyzer identification information for identifying whether or not the analyzer used for the assay has a dilution mode, and diluted sample identification information for identifying whether or not the sample used in the assay is a diluted sample; and (b) a control means for correcting the result when the analyzer used in the assay does not have a dilution mode, and the sample used in the assay is a diluted sample. Management apparatuses and recording media are also described.