Steaming-free and baking-free brick and preparation method thereof
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A technology of non-burning bricks and natural gas, applied in the field of building materials, can solve problems such as low strength
Inactive Publication Date: 2021-02-26
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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[0004] Chinese patent CN110683836A discloses a method for preparing sintered bricks from shale gas water-based drilling waste, which uses the mixture of drilling cuttings powder, fly ash and other materials, and is fired at a high temperature of 850-900°C to form sintered bricks, but there are low intensity problem
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[0024] The invention provides a method for preparing non-steaming and non-burning bricks, which comprises the following steps;
[0025] Mix natural gas water-based drilling solid waste, cement, desulfurized gypsum and fly ash to obtain a mixture;
[0026] mixing the mixture with water to obtain a mixed slurry;
[0027] The mixed slurry is sequentially subjected to molding, first curing, demoulding and curing at room temperature to obtain the non-steaming and non-burning brick.
[0028] In the present invention, the mixture preferably includes the following components in mass percentage: natural gas water-based drilling solid waste 45-50%; cement 20-30%; desulfurized gypsum 5-10%; fly ash 15-20% %.
[0029] In the present invention, the natural gas water-based drilling solid waste is preferably prepared by a method comprising the following steps: the natural gas water-based drilling solid waste mud is sequentially subjected to mud collection, gel breaking treatment and pressu...
Embodiment
[0040] The raw material ratio of each embodiment is as shown in Table 1.
[0041] The preparation method is as follows: the natural gas water-based drilling mud is collected through mud collection, gel breaking treatment, and pressure filtration (solid-liquid separation) to form a natural gas water-based drilling mud with a water content of 40%, and then mixed with cement, fly ash and desulfurized gypsum. After adding 6wt% of water and fully mixing, it is shaped by vibration, cured at 45°C for 24 hours, then demoulded, and then cured at room temperature for 28 days to obtain a strength of 15 MPa (MU15), and a non-steaming and non-burning brick is obtained.
[0042] The raw material proportioning (mass percentage composition) of each embodiment of table 1
[0043]
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Abstract
The invention provides a steaming-free and baking-free brick and a preparation method thereof, and belongs to the technical field of building materials. According to the method, reduction and recycling of the natural gas water-based drilling solid waste are realized; coal ash is fine ash in smoke generated after coal combustion, a large amount of cement and fine aggregate are saved by doping the coal ash, the water consumption is reduced, the workability of a mixed slurry is improved, the pumpability of the mixed slurry is enhanced, creep of the mixed slurry is reduced, hydration heat and heatenergy expansibility are reduced, and the impermeability of the steaming-free and baking-free brick is improved. The modifiability of the steaming-free and baking-free brick is improved; the cement is used as a cementing material, is powdery, and is mixed with a proper amount of water to form plastic slurry, the slurry can be changed into hard stone-like bodies through a physical and chemical process, the granular material can be cemented into a whole, and the cement can be better hardened in water to maintain and develop the strength; the desulfurized gypsum is used as a sulfate activator, plays a role of an accelerant, and can directly and indirectly enhance the strength of the steaming-free and baking-free brick.
Description
technical field [0001] The invention relates to the technical field of building materials, in particular to a non-steaming and non-burning brick and a preparation method thereof. Background technique [0002] my country is rich in natural gas reserves. With the increase of natural gas extraction, the problem of drilling waste treatment and disposal has gradually become prominent. During the exploitation of natural gas in my country, a large amount of cuttings and waste drilling fluid will be produced. According to statistics, the average amount of drilling cuttings and waste drilling fluid produced in a typical single well (well depth 3,500 meters) is about 1,000 m 3 . At present, drilling solid waste is mainly stored, which not only occupies a large amount of land resources, but also causes potential ecological environmental risks. [0003] Non-steaming and non-burning bricks use construction waste and industrial waste such as brick and tile stone powder, fly ash, cinder...
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Application Information
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