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A kind of hydrophilic slump-retaining mineral composite fiber particle and its preparation method

A composite fiber and hydrophilic technology, which is applied in the field of mineral composite fibers, can solve the problems of reduced adding efficiency, low automation rate, and low production efficiency, so as to slow down slump loss, realize production automation, and ensure pumping and pouring Effect

Inactive Publication Date: 2017-02-22
JIANGSU AOMI BUILDING MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The current hydrophilic mineral composite fiber and water reducing agent cannot meet the requirements of reducing the loss rate of ready-mixed concrete slump
[0009] In addition, due to the properties of hydrophilic mineral composite fibers that are easy to agglomerate, automatic addition, automatic weighing and automatic packaging cannot be realized in production, resulting in low production automation, low production efficiency, and high labor intensity for operators
[0010] Traditional fibers such as hydrophilic mineral composite fibers are easy to agglomerate and are added manually, which increases labor intensity and reduces the efficiency of addition; while the automatic feeding machines on the market use air compressors to blow the fibers To the silo, this reduces the mixing time between fiber and concrete, and the amount of fiber added is not easy to control, resulting in uneven fiber dispersion and uneven concrete quality in each silo.

Method used

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  • A kind of hydrophilic slump-retaining mineral composite fiber particle and its preparation method
  • A kind of hydrophilic slump-retaining mineral composite fiber particle and its preparation method
  • A kind of hydrophilic slump-retaining mineral composite fiber particle and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The mass ratio of hydrophilic mineral composite fiber and sodium lignin sulfonate is 1:0.024, mixed for 12 minutes in a dry environment with a temperature of 28 degrees Celsius, and the mixed mixture is placed in an environment with a humidity of 80% for 1.5 hours , the mixture is made into mixture granules, the diameter of the obtained mixture granules is 5 mm, the density of the mixture granules is 0.8 tons per cubic meter, and the moisture content of the mixture granules is 5%.

[0046] Three tests were done respectively, the first one used ester sulfonate concrete directly, the second one used ester sulfonate concrete mixed with the hydrophilic mineral composite fiber with patent No. 201010605747.1, and the third one used The ester group sulfonate concrete of the hydrophilic slump-retaining mineral composite fiber particles of the embodiment; the slump in different time periods and various performance indicators of the final concrete were recorded respectively.

[004...

Embodiment 2

[0058] The mass ratio of hydrophilic mineral composite fiber and sodium lignosulfonate is 1:0.021, mixed for 15 minutes in a dry environment with a temperature of 25 degrees Celsius, and the mixed mixture is made in a water mist environment with a temperature of 25 degrees Celsius Mixture particles, the water mist environment is sprayed by the flow rate of the spray device within the range of 30 milliliters per second; the spray device performs intermittent spraying, the number of sprays is within the range of 6 times, and the single spray time is 10 seconds. Be 70 seconds; The diameter of gained mixture particle is 8 millimeters, and the density of mixture particle is 0.9 tons per cubic meter, and the moisture content of mixture particle is 4%.

[0059] For the fourth test, the ester sulfonate concrete mixed with the hydrophilic slump-retaining mineral composite fiber particles of this embodiment was used; the slump in different time periods and the performance indicators of t...

Embodiment 3

[0067] The mass ratio of hydrophilic mineral composite fiber to sodium lignosulfonate is 1:0.026, mixed in a dry environment at a temperature of 30 degrees Celsius for 10 minutes, and the mixed mixture is placed in an environment with a humidity of 85% for 1.5 hours , the mixture is made into mixture granules, the diameter of the obtained mixture granules is 6 mm, the density of the mixture granules is 0.78 tons per cubic meter, and the moisture content of the mixture granules is 6%.

[0068] In the fifth test, ester sulfonate concrete mixed with the hydrophilic slump-retaining mineral composite fiber particles of this embodiment was used; the slump in different time periods and the performance indicators of the final concrete were recorded respectively.

[0069] (Table 7 is the slump record table of the fifth test, and Table 8 is the performance indicators of the concrete obtained in the first, second and fifth tests)

[0070] period of time Job status Slump (cm)...

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Abstract

The invention discloses a hydrophilic slump loss resistant mineral composite fiber granule and a preparation method thereof. The method comprises the steps of: 1) mixing hydrophilic mineral composite fiber with lignosulfonate to form a mixture; and 2) making the mixture of the hydrophilic mineral composite fiber and the lignosulfonate into mixture particles, thus obtaining the hydrophilic slump loss resistant mineral composite fiber granule. According to the hydrophilic slump loss resistant mineral composite fiber granule and the preparation method thereof provided by the invention, the composite fiber granule provided by the invention is added to conduct concrete stirring, not only effectively restrains the generation of concrete and mortar cracks, but also has the effects of toughening, reinforcing, and improvement of concrete durability, and can effectively retard the slump loss of concrete, thus guaranteeing the concrete workability. At the same time, the granule is convenient to realize automation of packaging and use and adding. The hydrophilic mineral composite fiber granule is dispersed among concrete coarse aggregate to ensure the dispersion effect in concrete.

Description

technical field [0001] The invention relates to the field of mineral composite fibers used in cement concrete and cement mortar, in particular to a hydrophilic slump-preserving mineral composite fiber particle and a preparation method thereof. Background technique [0002] Water reducer is the most widely used admixture in cement concrete. Water reducers can generally be divided into four types: naphthalene sulfonate—UNF, sulfamate high performance water reducer—AN, melamine resin—SM, ester sulfonate—OT. At present, most domestic commercial concrete mixing plants are mixed with designated water reducers according to engineering design requirements. In general, the main purpose of the commercial concrete company's self-selected water reducer is to reduce the amount of water and cement, reduce the cost as much as possible, and improve the workability and crack resistance of concrete. Engineering fibers such as steel fibers, polypropylene fibers, nylon and other chemical fibe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B14/38C04B24/18
Inventor 潘殿辉
Owner JIANGSU AOMI BUILDING MATERIALS TECH
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