Integrated device for measurement and evaluation of workability of self-compacting concrete

Abstract

This invention discloses one self-impacting concrete work property test and evaluation integration device, wherein, the rack supports and fixes switch head tamper cylinder with axis central line vertical to level surface with small diameter facing down; the said small diameter end is set with valve is set with plane board in certain distance; the said rack, plane board are fixed on band wheel cargo. This invention is one integration device to realize work property test.

Description

technical field [0001] The invention relates to an integrated device for testing and evaluating the properties of concrete materials. Background technique [0002] The workability test and evaluation of concrete is a very complicated problem. At present, the slump cylinder method is widely used [1，2] ([1] P. Kumar Mehta, Paulo J.M. Monteiro. CONCRETE: microstructure, properties and materials [M, third edition]. The McGraw-Hill Companies, New York, 2006; [2] Zhou Shiqiong. Civil engineering materials [M]. Beijing : China Railway Press, 2004), this method is simple and convenient, but it must be combined with subjective experience to reflect the rheological properties of concrete. Due to its very high workability requirements, self-compacting concrete includes three aspects: filling, segregation resistance and gap passage. [3] ([3] Hajime Okamura and Masahiro Ouchi. Self-compacting concrete: Development, present use and future [C], In: Proceedings of 1 st international RIL...

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Problems solved by technology

[0002] The workability test and evaluation of concrete is a very complicated problem. At present, the slump cylinder method is widely used [1，2] ([1] P. Kumar Mehta, Paulo J.M. Monteiro. CONCRETE: microstructure, properties and materials [M, third edition]. The McGraw-Hill Companies, New York, 2006; [2] Zhou Shiqiong. Civil engineering materials [M]. Beijing : China Railway Press, 2004), this method is simple and convenient, but it must be combined with subjective experience to reflect the rheological properties of concrete

Due to its very high workability requirements, self-compacting concrete includes three aspects: filling, segregation resistance and gap passage. [3] ([3] Hajime Okamura and Masahiro Ouchi. Self-compacting concrete: Development, present use and future [C], In: Proceedings of 1 st international RILEM Symposium onself-compacting concrete, Stockholm, Sweden, September, 1999: 3-14), the indicators obtained by using the traditional slump cylinder method are not enough to reflect the characteristics and requirements of self-compacting concrete "self-compacting", and Poor sensitivity of test results

Therefore, according to the characteristics of self-compacting concrete, many countries around the world have developed a lot of testing instruments for the workability of self-compacting concrete. [4-6] ([4] P.J.M.Bartos.Testing-SCC: Towards new European Standards for fresh SCC[C], In: Proceedings of 1 st international symposium on design, performance and use of self-consolidating concrete, Changsha, China, 2005: 25-46; [5] V.K.Buia,, D.Montgomeryb, I.Hinczakc, K.Turner.Rapidtesting method for segregation resistance of self -compacting concrete[J], Cement and Concrete Research, 2002, 32(9): 1489-1496; [6]M.Sonebi, M.Rooney and P.J.M.Bartos.Evaluation of the segregation resistance offresh self-compacting concrete using different test methods[C], In: Proceedings of 1 st international symposium on design, performance and use of self-consolidating concrete, Changsha, China, 2005: 301-308), such as L-shaped flow instrument, U-shaped instrument, V-shaped funnel, Orimet instrument, J-ring instrument, etc. However, these single The method is not enough to fully reflect the rheological properties of self-compacting concrete. Often, two or three methods are used in combination, which is complicated to operate and poor in reproducibility. Moreover, most of these test methods can only reflect the workability of concrete under static conditions. There are differences in the dynamic conditions of the actual concrete pouring, etc.

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