CN110282917A - A kind of preparation method of bagasse lime and brick - Google Patents

Abstract

The invention discloses a preparation method of bagasse ash mortar, which comprises the following steps: pretreating the bagasse ash discharged from the furnace of a sugar factory to improve the activity of the bagasse ash. The pretreated bagasse ash is used as the raw material for preparing mortar, mixed with sand, water, cement, and water reducer, poured, vibrated, and made into bagasse ash mortar products, which are further cured by standard curing. The prepared bagasse ash mortar has higher structural strength and durability. Compared with the traditional mortar, the invention can fully reuse the bagasse ash on the premise of improved performance, reduce resource consumption, and is beneficial to realize economical and environment-friendly production.

Description

A kind of preparation method of bagasse ash mortar

technical field

The invention relates to the field of building materials, in particular to a preparation method of bagasse ash mortar.

Background technique

Cement has the disadvantages of high energy consumption, high pollution, and high cost, which to a certain extent aggravates the greenhouse effect and causes harm to the environment. In recent years, green and environmentally friendly building materials have attracted a lot of attention. Continuous research has shown that agricultural by-products such as bagasse ash not only have huge yields and broad prospects, but also can be used as mineral admixtures to improve various properties of mortar.

Bagasse ash is taken from the high-temperature furnace of the sugar factory, which is the ashes produced by burning bagasse as fuel at a high temperature of 700-900°C. Bagasse ash is mainly composed of SiO ₂ , and there are other components such as Al ₂ O ₃ , CaO, Fe ₂ O ₃ , etc., and has pozzolanic activity. It can undergo secondary hydration reaction with cement at room temperature to form a compound with hydraulic gelling properties, which can improve the strength and durability of mortar.

Due to the instability of the furnace temperature and the incompleteness of combustion, the bagasse ash obtained directly from the sugar factory furnace is usually volatile, with large particle size and high porosity. In most cases, it cannot be directly used as a mineral blend. material. Therefore, we propose a preparation method of bagasse ash mortar to solve the above problems.

Contents of the invention

Aiming at the deficiencies of the prior art, the object of the present invention is to provide a method for preparing bagasse ash mortar. The bagasse ash prepared by the method has good pozzolanic activity and can be used as a high-quality mineral admixture to effectively improve the performance of mortar. At the same time, part of the replacement of cement by bagasse ash can reduce the amount of cement, reduce energy consumption, and achieve the purpose of economical and environmentally friendly production.

To achieve the above object, the technical scheme of the present invention is as follows:

A bagasse ash mortar, characterized in that the raw material components of the bagasse ash mortar are: 10-20 parts of pretreated bagasse ash, 100 parts of cement, 100-300 parts of sand, 30-55 parts of water, water-reducing Dose 0-2 parts. The pretreated bagasse ash is used as the raw material of bagasse ash mortar, mixed with sand, water, cement, and water reducer, poured, vibrated, and made into bagasse ash mortar products, which are further cured by standard curing.

The specific surface area of the pretreated bagasse ash is higher than 350m ² /kg and the sieve residue of 45μm is lower than 10%.

The water reducer is one of polycarboxylic acid, sulfonated naphthalene series, sodium lignosulfonate, sodium sulfite, tannin and sugar calcium water reducer.

The bagasse ash mortar does not need to add a water reducing agent under the condition of satisfying the workability.

The preparation method of described bagasse ash mortar is prepared through the following steps:

Step 1: calcining the bagasse ash at a high temperature of 300-1000° C. for 1-4 hours, and cooling naturally. adding 0.02%-0.2% triisopropanolamine (TIPA) to the cooled bagasse ash raw material, and grinding it in a ball mill until the specific surface area is higher ^than 350m2/kg and the 45μm sieve residue is lower than 10%, Obtain the required bagasse ash sample;

Step 2: Put the pretreated bagasse ash and cement in corresponding parts by mass into a mixer and stir for 2-5 minutes to obtain a dry mix, which is further stored in a polyethylene bottle for use, and kept dry and sealed;

Step 3: uniformly stir the dry-mixed mixture with water and water reducing agent in corresponding parts by mass for 2-5 minutes, and further mix and stir with sand to obtain bagasse ash mortar products;

Step 4: Pour the prepared bagasse ash mortar into the mold, place the mold on a vibrating table and vibrate for 3-5 minutes to remove the air bubbles inside the mortar, place the vibrated bagasse ash mortar product for 24 hours to remove the mold, and further adopt the standard curing maintenance.

The bagasse ash is calcined in the first step to remove the moisture contained in the bagasse ash, avoid the adhesion between them due to moisture, reduce the loss on ignition and reduce the carbon content, so that the bagasse ash has good quality.

As described in step 2, the bagasse ash and cement are mixed first, and then other mortar components are added to make the bagasse ash and cement mix evenly.

Compared with the prior art, the present invention has the following beneficial effects:

(1) The pozzolanic activity of bagasse ash is improved by pretreatment of bagasse ash. Part of the cement is replaced by an amount of 10%-20%, which enhances the compactness of the structure, reduces the pores between raw materials, and improves the mechanical strength and durability of the mortar.

(2) Compared with the traditional mortar, under the premise of improving the performance, not only the cost is reduced by about 20%, but also the bagasse ash can be effectively reused to achieve environmental protection production and improve economic benefits, thereby improving the bagasse ash mortar. Apply effects.

Description of drawings

Fig. 1 is the process flow chart of the preparation method of bagasse ash mortar of the present invention.

Detailed ways

The technical solution of the present invention will be described in detail below in conjunction with the examples, so that those skilled in the art can better understand the present invention, but the present invention is not limited thereby.

Example 1

This embodiment is an example of the preparation method of the bagasse ash mortar of the present invention. The components and their corresponding parts by mass are shown in Table 1. The bagasse ash in this example is used in an amount of 10% to replace part of the cement. Prepare bagasse ash mortar according to described mixing ratio, and concrete method comprises the steps:

Step 1: Calcining the bagasse ash at a high temperature of 650° C. for 1 hour, and cooling naturally. Add 0.05% triisopropanolamine (TIPA) to the cooled bagasse ash raw material, grind it in a ball mill until the sieve residue of 45 μm is less than 10%, and the specific surface area of the bagasse ash prepared at this time is 943m ² / kg.

Step 2: Put the bagasse ash and cement after the pretreatment of the corresponding parts by mass into the mixer and stir for 3 minutes to obtain the dry mix, which is stored in a polyethylene bottle for use, and kept dry and sealed;

Step 3: uniformly stir the dry-mixed mixture with water and water reducing agent in corresponding parts by mass for 2 minutes, and further mix and stir with sand to obtain bagasse ash mortar products;

Step 4: Pour the prepared mortar into the mold, place the mold on a vibrating table and vibrate for 3 minutes to remove the air bubbles inside the mortar, place the vibrated mortar product for 24 hours to remove the mold, and further adopt standard maintenance.

Example 2

This embodiment is another example of the preparation method of bagasse ash mortar of the present invention. The difference from Example 1 is that each component and its corresponding mass parts are as shown in Table 1. The bagasse ash of this example Replace part of the cement with a dosage of 15%.

Example 3

This embodiment is another example of the preparation method of bagasse ash mortar of the present invention. The difference from Example 1 is that each component and its corresponding mass parts are as shown in Table 1. The bagasse ash of this example Replace part of the cement with a dosage of 10%.

Example 4

This embodiment is another example of the preparation method of bagasse ash mortar of the present invention. The difference from Example 1 is that each component and its corresponding mass parts are as shown in Table 1. The bagasse ash of this example Replace part of the cement with a dosage of 15%.

Example 5

This embodiment is the fifth example of the preparation method of bagasse ash mortar of the present invention. The difference from Example 1 is that each component and its corresponding mass parts are as shown in Table 1. The bagasse of this example Ash replaces part of the cement in an amount of 20%.

Comparative example 1

This example is a preparation method of a traditional ordinary mortar. As a comparative example of Example 1-2, each component and its corresponding mass parts are shown in Table 1.

Comparative example 2

This example is a preparation method of a traditional ordinary mortar. As a comparative example of Examples 3-5, the components and their corresponding parts by mass are shown in Table 1.

Table 1 The components of raw materials and their corresponding parts by mass

The performance of the mortar product described in embodiment 1-5 and comparative example 1-2 is as shown in table 2:

Table 2 Performance table of mortar products

As can be seen from the above-mentioned detection results, the bagasse ash mortar prepared by the present invention is compared with traditional common mortar, and the compressive strength all improves to some extent, compares common mortar 28d strength test result, and the intensity of embodiment 1-2 is relative to comparative example 1 The increments are 120% and 113% respectively; the strength increments of Examples 3-5 relative to Comparative Example 2 are 106%, 119% and 107% respectively.

The above only describes the preferred specific implementation of the present invention, and does not limit the patent scope of the present invention. Those skilled in the art are within the technical scope disclosed in the present invention. Any modification or transformation is within the scope of patent protection of the present invention.

Claims (6)

1. A kind of bagasse ash mortar, it is characterized in that, its raw material composition and mass parts are: 10-20 parts of bagasse ash after pretreatment, 100 parts of cement, 100-300 parts of sand, 30-55 parts of water, water reducing The pretreated bagasse ash is used as the raw material of bagasse ash mortar, mixed with sand, water, cement, and water reducing agent, poured, vibrated, and made into bagasse ash mortar products, and further adopts standard curing and curing. 2. The bagasse ash mortar according to claim 1, characterized in that the specific surface area of the pretreated bagasse ash is higher than 350 m ² /kg and the sieve residue of 45 μm is lower than 10%. 3. bagasse ash mortar according to claim 1, is characterized in that, described water reducer is polycarboxylic acid, sulfonated naphthalene series, sodium lignosulfonate, sodium sulfite, tannin and sugar calcium water reducer A sort of. 4. the preparation method of bagasse ash mortar according to claim 1, is characterized in that, prepares by following steps: Step 1: calcining the bagasse ash at a high temperature of 300-1000°C for 1-4h, cooling naturally, adding 0.02%-0.2% by mass of triisopropanolamine (TIPA) to the cooled bagasse ash and grinding it in a ball mill Until the specific surface area is higher than 350m ² /kg and the sieve residue of 45 μm is lower than 10%, the required bagasse ash sample is obtained; Step 2: Put the pretreated bagasse ash and cement in corresponding parts by mass into a mixer and stir for 2-5 minutes to obtain a dry mix, which is further stored in a polyethylene bottle for use, and kept dry and sealed; Step 3: uniformly stir the dry-mixed mixture with water and water reducing agent in corresponding parts by mass for 2-5 minutes, and further mix and stir with sand to obtain bagasse ash mortar products; Step 4: Pour the prepared bagasse ash mortar into the mold, place the mold on a vibrating table and vibrate for 3-5 minutes to remove the air bubbles inside the mortar, place the vibrated bagasse ash mortar product for 24 hours to remove the mold, and further adopt the standard curing maintenance. 5. the preparation method of bagasse ash mortar according to claim 4 is characterized in that, the described bagasse ash calcining process of step 1, removes the moisture that itself contains, avoids its mutual adhesion due to moisture, reduces burning simultaneously. Loss, reduce carbon content, so that the bagasse ash has good quality. 6. The preparation method of bagasse ash mortar according to claim 5, characterized in that, in step 2, the bagasse ash and cement are mixed first, and then other mortar components are added to make the bagasse ash and cement mix evenly.