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Fly ash concrete light weight multi-porous ribbon board and manufacturing method thereof

A manufacturing method and technology of fly ash, applied in the direction of manufacturing tools, building structures, building components, etc., can solve the problems of easy shrinkage cracks, increased drying shrinkage value, and poor carbonization resistance of boards, so as to achieve beneficial benefits Waste and environmental protection requirements, increase the strength and compactness of concrete, and improve the effect of anti-carbonization performance

Inactive Publication Date: 2006-08-23
陈福广
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Apparently, light porous slats such as ordinary industrial ash slag contain a large amount of C with high crystallinity 4 S 5 h 5 The products of tobermullite hydration products have low strength and large shrinkage value
In general industrial ash-slag concrete and other lightweight hollow slabs, more cement is often added to improve the strength of the product, and more fly ash and expanded perlite are added to pursue "lightness", which leads to an increase in the drying shrinkage of the board, and its durability and Atmospheric stability is poor, not only the amount of cement is large, but also in use, the board is prone to shrinkage cracks, hollowing, falling off, expansion, warping, and even transverse or longitudinal fractures, which greatly affects the engineering quality and cause serious safety hazards
[0003] The existing air-entrained concrete solid slabs are mixed with foaming agent in the raw material, and are poured into a large water-cement ratio flow slurry, which has no structural strength in the early stage, although it can also produce tobermol under autoclaved curing. Stone hydration products, but due to the non-dense concrete with porous structure, the concrete strength of the board is very low, only about 2.5-5MPa; for the fly ash aerated concrete board in my country, the temperature and pressure of autoclaved curing are also low, All ≤175°C, 10MPa pressure, generate C with higher crystallinity 4 S 5 h 5 There are few hydration products of tobermullite and hydrogarnet, which cause large shrinkage value and poor carbonization resistance, and the plate is prone to shrinkage cracks

Method used

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  • Fly ash concrete light weight multi-porous ribbon board and manufacturing method thereof
  • Fly ash concrete light weight multi-porous ribbon board and manufacturing method thereof
  • Fly ash concrete light weight multi-porous ribbon board and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] Such as figure 1 As shown, the long-line pedestal method is used to extrude the lightweight porous slab of fly ash concrete with a mixture of 1000 kg: take the fly ash containing SiO 2 46.5%, quicklime contains CaO65%, cement is ordinary portland cement 42.5 # . Its manufacturing steps are as follows:

[0100] Step 1: According to the early strength requirements of the board, add 15% cement, and design ingredients according to C / S=0.25:

[0101] Set the amount of fly ash X and the amount of lime Y, and establish the calculation formula:

[0102] X + Y = 60 % ( C × Y + 10 % × A ) ...

Embodiment 2

[0115] Such as figure 1 As shown, the long-line pedestal method is used to extrude the lightweight porous slab of fly ash concrete with a mixture of 1000 kg: take the fly ash containing SiO 2 46.5%, lime contains CaO65%, cement is ordinary portland cement 42.5 # .

[0116] Step 1: According to the early strength requirements of the board, mix 23% of cement, and design the ingredients according to C / S=0.45:

[0117] Set the amount of fly ash X and the amount of lime Y, and establish the calculation formula:

[0118] X + Y = 65 % ( C × Y + 10 % × A ) / S ...

Embodiment 3

[0131] Such as figure 1 As shown, the lightweight porous slab of fly ash concrete with a mixture of 1000 kg is extruded by the flow method of the unit: take the fly ash containing SiO 2 46.5%, lime contains CaO65%, cement is ordinary portland cement 42.5 # .

[0132] Step 1: According to the early strength requirements of the board, add 15% cement, design the ingredients according to C / S=0.35, set the amount of fly ash X and the amount of lime Y, and establish the calculation formula:

[0133] X + Y = 65 % ( C × Y + 10 % × A ) / S × ...

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Abstract

The present invention discloses one kind of light porous flyash concrete slat and its production process, and aims at solving shrinkage crack, atmospheric instability and other problems in slat production. The technological scheme is the slat producing process with the mixture of cement, flyash, lime, sand and light aggregate and through extrusion, laying reinforcing bars, molding in vertical mold or grouting, activation, naturally or steam curing, secondary steam curing. The present invention features the CaO / SiO2 ratio of 0.25-0.45 in the mixture. The product has high strength, low shrinkage, short curing period and low cost, and is environment friendly.

Description

technical field [0001] The invention relates to a lightweight porous strip, in particular to a fly ash concrete lightweight porous strip and a manufacturing method thereof, belonging to the field of new building panels. Background technique [0002] Existing industrial ash slag concrete and other lightweight hollow partition wall slats all use cement as the cementitious material, fly ash as the admixture, and mix it into a concrete mixture, which is formed into a slab by screw extrusion or group forming. The strength of the product is formed under natural curing at room temperature or ordinary steam curing at 90°C to 100°C. The material mix ratio is based on the traditional experience, according to the strength theory, the ingredients are designed, and the mix ratio is adjusted according to the requirements of the surface density; the hydration products formed in the product are mainly CSH gel and Ca(OH) with poor crystallinity. ) 2 Crystals constitute the structural stren...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B18/08C04B28/18B28B3/22B28B23/00E04C2/00
CPCY02W30/91
Inventor 陈福广
Owner 陈福广
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