CN102040358B - Mortar detection method for concrete bleeding - Google Patents

Abstract

The invention discloses a mortar detection method for concrete bleeding, which solves the problems of time consumption, labor wasting, poor pertinence and difficult fault finding of the conventional concrete mixture-based concrete bleeding detection. The mortar detection method for concrete bleeding comprises the following steps of: (1) determining mixing proportion of C30 concrete with a large using amount as a reference mixing proportion; (2) stirring, namely pouring water into an additive-containing container, adding mixed solution of water and an additive into a stirring boiler, pouring a uniformly-stirred gelled material and the mixture of sand and broken stone into the stirring boiler, putting the stirring boiler on a fixing frame, raising the stirring boiler to a fixed position for stirring, pouring the stirred material into a bucket, covering the bucket and standing under normal pressure; and (3) judging bleeding. By the method, the bleeding factors of concrete can be quickly, conveniently and correctly determined, and a foundation for providing a solution for solving concrete bleeding is laid; and the method has a wide application range.

Description

Concrete water bleeding glue sand detection method

Technical field

The present invention's invention relates to the concrete construction technical field, is specially a kind of concrete water bleeding glue sand detection method.

Background technology

Often occur bleeding and these common quality defects of husky line in the concrete construction, have a strong impact on the presentation quality of buildings.Concrete bleeding receives the influence of many factors, confirms that key factor plays a leading role, and has just found the key that solves the concrete water bleeding problem.It is main that concrete water bleeding in the act.std detects with concrete mix, time and effort consuming, and specific aim is poor, is difficult to investigate thoroughly reason.Principal element to concrete water bleeding is Binder Materials and these characteristics of water reducer; Study a kind of rapid and convenient, can judge accurately that any Binder Materials or water reducer are the methods of inspection that causes the principal element of concrete water bleeding, provide the active prophylactico-therapeutic measures to lay the first stone solving concrete bleeding problem.

Summary of the invention

The present invention is main in order to solve existing concrete water bleeding detection with concrete mix; Time and effort consuming; Specific aim is poor, is difficult to investigate thoroughly the problem of reason, and a kind of concrete water bleeding glue sand detection method is provided; To reach rapid and convenient, accurately to judge and the purpose of concrete water bleeding factor provide countermeasure to lay the first stone for solving concrete water bleeding.

The present invention adopts following technical scheme to realize:

Concrete water bleeding glue sand detection method may further comprise the steps:

(1) the C30 concrete mixture ratio of confirming large usage quantity is the benchmark match ratio: gel material content is 380Kg, sand coarse aggregate ratio 40%, water consumption 152Kg; Water-cement ratio is 0.4; The slump 180～200 ㎜, divergence 400～500 ㎜ are advisable, and the additive consumption accounts for glue material use quantity 0.9%～1.0%; (2) stir: at first water is poured in the container at additive place; Add water and additive mixed liquor in the agitated kettle, then the potpourri of the Binder Materials that stirs and sand and rubble is poured in the agitated kettle, be placed on agitated kettle on the fixed mount; Begin to stir after rising to the fixed position; The material that will stir is then poured in the bucket, adds loam cake, and normal pressure leaves standstill;

(3) bleeding is judged: mortar layering, bleeding, bleeding do not occur, is precipitated as qualifiedly in the bucket through 40min leaves standstill after, if generation layering, bleeding, bleeding, deposition can be judged to bleeding, this match ratio is inapplicable.

But the inventive method rapid and convenient, accurately judge the purpose of concrete water bleeding factor; Provide countermeasure to lay the first stone for solving concrete water bleeding; Of many uses; Can be used for: ⑴ adjustment cement and admixture different proportion, can check the bleeding of admixture (flyash, ground slag) when different volume; ⑵ adjustment additive concentration, different formulations or consumption, can detect the bleeding of additive under different volumes and variable concentrations, different formulations or consumption; ⑶ when match ratio is constant, can detect the march into the arena bleeding of material of Binder Materials (cement, flyash, ground slag) different batches.⑷ detect the bleeding of concrete admixture.

Embodiment

1, test method:

Reference to standard: GB/T17671 " Test method for strength of hydraulic cement mortar (ISO method) ".

2, instrument and equipment:

⑴ the planetary cement mortar mixer of JC/T681-1997; ⑵ 100ml graduated cylinder; ⑶ 3 of metal bucket that volume 5L is with cover or Plastic Drums; ⑷ precision 0.01g, one of the electronic balance of maximum capacity 2000g.

3 test materials:

⑴ in the construction with cement, flyash, additive; ⑵ sand: iso standard sand; ⑶ construction water.

4, test procedure:

⑴ batching: the match ratio batching of according to the form below, take by weighing various materials respectively, cement, sand, water, admixture, additive, the temperature of test tools made is identical with the testing laboratory room temperature, and cement, sand, flyash weighing are accurate to 1g, and water, additive are accurate to 0.1g,

Material	Cement	Admixture	Iso standard sand	Water	Additive
						Quality (g)	488	209	1350	279	6．27

Annotate: but cement and admixture in Binder Materials shared ratio according to the test objective resize ratio.

⑵ stir: every pot of glue sand carries out mechanical raking with stirring machine, earlier stirring machine is got into duty, and operate by following step then: 1. additive separates weighing with water; Pour water in the container at additive place into then; Add water and additive mixed liquor in the agitated kettle, pour cement then into, be placed on agitated kettle on the fixed mount; Rise to the fixed position, machine immediately then.2. the glue sand that machine was stirred is poured in the bucket, adds loam cake, and by the preset scheme of the difference system of mixing 3 or a plurality of match ratio, the normal pressure through 60min leaves standstill again, observes the bleeding state then respectively.

5, bleeding is judged: in through 40min leaves standstill after barrel mortar layering, bleeding, bleeding do not appear, be precipitated as qualified.If generation layering, bleeding, bleeding, deposition can be judged to bleeding, this match ratio is inapplicable.

Claims (1)

1. concrete water bleeding glue sand detection method is characterized in that may further comprise the steps:

(1) the C30 concrete mixture ratio of confirming large usage quantity is the benchmark match ratio: gel material content is 380Kg, sand coarse aggregate ratio 40%, water consumption 152Kg; Water-cement ratio is 0.4; The slump 180～200 ㎜, divergence 400～500 ㎜, the additive consumption accounts for gel material content 0.9%～1.0%;

(2) stir: at first water is poured in the container at additive place; Add water and additive mixed liquor in the agitated kettle, then the potpourri of the Binder Materials that stirs and sand and rubble is poured in the agitated kettle, be placed on agitated kettle on the fixed mount; Begin to stir after rising to the fixed position; The material that will stir is then poured in the bucket, adds loam cake, and normal pressure leaves standstill;

(3) bleeding is judged: mortar layering, bleeding, bleeding do not occur, is precipitated as qualifiedly in the bucket through 40min leaves standstill after, if generation layering, bleeding, bleeding, deposition can be judged to bleeding, this match ratio is inapplicable.