CN112624691A - Production method of high-efficiency low-emission silent crushing agent for producing Z-shaped concrete hollow blocks - Google Patents
Production method of high-efficiency low-emission silent crushing agent for producing Z-shaped concrete hollow blocks Download PDFInfo
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- CN112624691A CN112624691A CN202011503460.8A CN202011503460A CN112624691A CN 112624691 A CN112624691 A CN 112624691A CN 202011503460 A CN202011503460 A CN 202011503460A CN 112624691 A CN112624691 A CN 112624691A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/28—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/282—Polyurethanes; Polyisocyanates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00974—Uses not provided for elsewhere in C04B2111/00 for pyrotechnic applications, e.g. blasting
Abstract
The invention discloses a production method of a high-efficiency low-emission silent breaking agent for producing Z-shaped concrete hollow blocks, which is prepared from 15-20 parts of anhydrous polyurethane resin, 8-15 parts of straw extract, 3-8 parts of calcium oxide, 50-80 parts of portland cement, 2-8 parts of a water reducing agent, 3-9 parts of a phase-change material and 1-2 parts of an exciting agent by mass. According to the invention, the anhydrous polyurethane resin and the straw extract are added into the common soundless crushing agent, on the premise of not influencing the effect of the soundless crushing agent, the production cost of the soundless crushing agent is greatly reduced, meanwhile, the anhydrous polyurethane resin and the straw extract have the technical effects of water absorption and slow setting, the failure and potential safety hazard caused by the too fast water absorption expansion of calcium oxide are avoided, and meanwhile, the proportion of the water absorption expansion of the calcium oxide and the straw extract is high, so that the expansion performance of the calcium oxide can be effectively increased, and the crushing effect of the soundless crushing agent is further improved.
Description
Technical Field
The invention relates to the technical field of concrete production, in particular to a production method of a high-efficiency low-emission silent cracking agent for producing Z-shaped concrete hollow blocks.
Background
The concrete is artificial stone which is prepared by taking cement as a main cementing material, adding water, sand, stones and chemical additives and mineral admixtures if necessary, mixing the materials according to a proper proportion, uniformly stirring, densely molding, curing and hardening. Concrete is mainly divided into two stages and states: plastic state before setting and hardening, namely fresh concrete or concrete mixture; hardened, i.e. hardened concrete or concrete. The concrete strength grade is divided into cubic compression strength standard values, and the common Chinese concrete strength grade is divided into 14 grades.
Soundless breaker: the soundless crushing agent is a non-explosive crushing powdery material with high expansion performance, which is prepared by calcining an inorganic compound mainly containing calcium oxide at high temperature, adding a proper amount of an additive, and grinding together, and mainly utilizes the principle that calcium oxide (f-CaO) is hydrated after being calcined at high temperature to form calcium hydroxide (Ca (OH)2) and the volume of the calcium hydroxide is expanded. At present, the silent cracking agents produced by the technology are various.
In the prior art, the production cost of the concrete soundless breaking agent is high, and the development of enterprises is not facilitated.
Disclosure of Invention
In order to solve the problems in the background technology, the invention provides a production method of a high-efficiency low-emission silent cracking agent for producing Z-shaped concrete hollow blocks.
A production method of a high-efficiency low-emission silent cracking agent for producing Z-shaped concrete hollow blocks comprises the following steps:
the material is prepared from 15-20 parts by weight of anhydrous polyurethane resin, 8-15 parts by weight of straw extract, 3-8 parts by weight of calcium oxide, 50-80 parts by weight of Portland cement, 2-8 parts by weight of water reducing agent, 3-9 parts by weight of phase-change material and 1-2 parts by weight of excitant.
Further, the anhydrous polyurethane resin is prepared from the following components in parts by weight: 5-10 parts of polyisocyanate, 12-18 parts of polyester polyol, 1-3 parts of sodium sulfonate, 3-9 parts of dimethylethanolamine and 80-100 parts of water; the preparation method comprises the following specific steps: mixing the raw materials, air drying with 60-80 deg.C hot air for 20-30min, and vacuum dehydrating at 100-140 deg.C until the water content is less than 0.02%
Further, the preparation method of the straw extract specifically comprises the following steps:
(1) taking straws, cleaning and drying the straws until the water content is below 5%, crushing the straws into 40 meshes, adding 2 times of the straw by mass of enzymolysis liquid, carrying out enzymolysis for 30min at 30-35 ℃, and filtering to obtain filtrate and filter residues;
(2) adding 3 times of 75% ethanol solution of the filter residue in parts by weight into the filter residue, performing shake ethanol extraction at 300r/min for 20min, separating ethanol extract, and recovering ethanol to obtain extract;
(3) and uniformly mixing the filtrate and the extracting solution, then sterilizing at high temperature, and secondarily filtering to remove impurities.
Further, the phase change material is sodium thiosulfate pentahydrate.
Further, the exciting agent is prepared by mixing normalized lime and sodium carbonate according to the mass ratio of 1: 3-5.
Further, the water reducing agent is prepared from sulfamate and lignosulfonate according to a mass ratio of 1: 5-8, and mixing.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the anhydrous polyurethane resin and the straw extract are added into the common soundless crushing agent, on the premise of not influencing the effect of the soundless crushing agent, the production cost of the soundless crushing agent is greatly reduced, meanwhile, the anhydrous polyurethane resin and the straw extract have the technical effects of water absorption and slow setting, the failure and potential safety hazard caused by the too fast water absorption expansion of calcium oxide are avoided, and meanwhile, the proportion of the water absorption expansion of the calcium oxide and the straw extract is high, so that the expansion performance of the calcium oxide can be effectively increased, and the crushing effect of the soundless crushing agent is further improved.
Detailed Description
Example 1
A production method of a high-efficiency low-emission silent cracking agent for producing Z-shaped concrete hollow blocks comprises the following steps:
the material is prepared from 15 parts of anhydrous polyurethane resin, 8 parts of straw extract, 3 parts of calcium oxide, 50 parts of Portland cement, 2 parts of water reducing agent, 3 parts of phase-change material and 1 part of excitant by mass.
Further, the anhydrous polyurethane resin is prepared from the following components in parts by weight: 5 parts of polyisocyanate, 12 parts of polyester polyol, 1 part of sodium sulfonate, 3 parts of dimethylethanolamine and 80 parts of water; the preparation method comprises the following specific steps: mixing the raw materials, air drying with 60-80 deg.C hot air for 20-30min, and vacuum dehydrating at 100-140 deg.C until the water content is less than 0.02%
Further, the preparation method of the straw extract specifically comprises the following steps:
(1) taking straws, cleaning and drying the straws until the water content is below 5%, crushing the straws into 40 meshes, adding 2 times of the straw by mass of enzymolysis liquid, carrying out enzymolysis for 30min at 30-35 ℃, and filtering to obtain filtrate and filter residues;
(2) adding 3 times of 75% ethanol solution of the filter residue in parts by weight into the filter residue, performing shake ethanol extraction at 300r/min for 20min, separating ethanol extract, and recovering ethanol to obtain extract;
(3) and uniformly mixing the filtrate and the extracting solution, then sterilizing at high temperature, and secondarily filtering to remove impurities.
Further, the phase change material is sodium thiosulfate pentahydrate.
Further, the exciting agent is prepared by mixing normalized lime and sodium carbonate according to the mass ratio of 1: 3.
Further, the water reducing agent is prepared from sulfamate and lignosulfonate according to a mass ratio of 1:5 mixing to obtain the final product.
Example 2
A production method of a high-efficiency low-emission silent cracking agent for producing Z-shaped concrete hollow blocks comprises the following steps:
the material is prepared from 20 parts by mass of anhydrous polyurethane resin, 15 parts by mass of straw extract, 8 parts by mass of calcium oxide, 80 parts by mass of portland cement, 8 parts by mass of water reducing agent, 9 parts by mass of phase change material and 2 parts by mass of excitant.
Further, the anhydrous polyurethane resin is prepared from the following components in parts by weight: 10 parts of polyisocyanate, 18 parts of polyester polyol, 3 parts of sodium sulfonate, 9 parts of dimethylethanolamine and 100 parts of water; the preparation method comprises the following specific steps: mixing the raw materials, air drying with 60-80 deg.C hot air for 20-30min, and vacuum dehydrating at 100-140 deg.C until the water content is less than 0.02%
Further, the preparation method of the straw extract specifically comprises the following steps:
(1) taking straws, cleaning and drying the straws until the water content is below 5%, crushing the straws into 40 meshes, adding 2 times of the straw by mass of enzymolysis liquid, carrying out enzymolysis for 30min at 30-35 ℃, and filtering to obtain filtrate and filter residues;
(2) adding 3 times of 75% ethanol solution of the filter residue in parts by weight into the filter residue, performing shake ethanol extraction at 300r/min for 20min, separating ethanol extract, and recovering ethanol to obtain extract;
(3) and uniformly mixing the filtrate and the extracting solution, then sterilizing at high temperature, and secondarily filtering to remove impurities.
Further, the phase change material is sodium thiosulfate pentahydrate.
Further, the exciting agent is prepared by mixing normalized lime and sodium carbonate according to the mass ratio of 1: 5.
Further, the water reducing agent is prepared from sulfamate and lignosulfonate according to a mass ratio of 1: 8, mixing to obtain the product.
Example 3
A production method of a high-efficiency low-emission silent cracking agent for producing Z-shaped concrete hollow blocks comprises the following steps:
the composite material is prepared from 18 parts by mass of anhydrous polyurethane resin, 10 parts by mass of straw extract, 5 parts by mass of calcium oxide, 60 parts by mass of portland cement, 6 parts by mass of water reducing agent, 7 parts by mass of phase-change material and 1.5 parts by mass of excitant.
Further, the anhydrous polyurethane resin is prepared from the following components in parts by weight: 8 parts of polyisocyanate, 14 parts of polyester polyol, 2 parts of sodium sulfonate, 6 parts of dimethylethanolamine and 90 parts of water; the preparation method comprises the following specific steps: mixing the raw materials, air drying with 60-80 deg.C hot air for 20-30min, and vacuum dehydrating at 100-140 deg.C until the water content is less than 0.02%
Further, the preparation method of the straw extract specifically comprises the following steps:
(1) taking straws, cleaning and drying the straws until the water content is below 5%, crushing the straws into 40 meshes, adding 2 times of the straw by mass of enzymolysis liquid, carrying out enzymolysis for 30min at 30-35 ℃, and filtering to obtain filtrate and filter residues;
(2) adding 3 times of 75% ethanol solution of the filter residue in parts by weight into the filter residue, performing shake ethanol extraction at 300r/min for 20min, separating ethanol extract, and recovering ethanol to obtain extract;
(3) and uniformly mixing the filtrate and the extracting solution, then sterilizing at high temperature, and secondarily filtering to remove impurities.
Further, the phase change material is sodium thiosulfate pentahydrate.
Further, the exciting agent is prepared by mixing normalized lime and sodium carbonate according to the mass ratio of 1: 4.
Further, the water reducing agent is prepared from sulfamate and lignosulfonate according to a mass ratio of 1: 7 mixing to obtain the product.
Comparative example 1
Compared with the example 1, the comparative example does not carry out the crushing operation in the step (1), and directly carries out enzymolysis on the straws which are not crushed, except the steps of the other methods are the same.
Comparative example 2
Compared with the embodiment 2, the operation in the step (2) is not carried out, the filtrate and the filter residue in the step (1) are directly and uniformly mixed in the step (3) and then are disinfected at high temperature, and the secondary filtration is carried out to remove impurities, except the steps of the other methods are the same.
Comparative example 3
This comparative example is compared with example 3 in that a polyurethane resin is used as a raw material instead of the anhydrous polyurethane resin, except that the process steps are the same.
Control group
Commercially available silent breakers were used.
The types SCA-I, SCA-II and SCA-III were produced using the above 7 types of silent cracking agents, respectively, and experiments were carried out according to the method of appendix A in JC 506-2008, silent cracking agent, and the swelling pressures at various ages are shown in Table 1:
TABLE 1
As can be seen from Table 1, the expansion pressure of each model produced by the silent cracking agent of the embodiment is far greater than that of each model produced by the silent cracking agent of the comparative example and the control group, so that the production method of the high-efficiency low-emission silent cracking agent for producing the Z-shaped concrete hollow block provided by the invention can effectively increase the expansion performance of calcium oxide and further improve the cracking effect of the silent cracking agent.
The above description is only for the preferred embodiment of the present invention, but the present invention is not limited to the scope of the implementation, and all the equivalent embodiments changed or modified according to the concept of the present invention should be within the scope of the protection of the present invention without departing from the spirit covered by the description and the embodiments.
Claims (10)
1. A production method of a high-efficiency low-emission silent cracking agent for producing Z-shaped concrete hollow blocks is characterized by comprising the following steps:
the material is prepared from 15-20 parts by weight of anhydrous polyurethane resin, 8-15 parts by weight of straw extract, 3-8 parts by weight of calcium oxide, 50-80 parts by weight of Portland cement, 2-8 parts by weight of water reducing agent, 3-9 parts by weight of phase-change material and 1-2 parts by weight of excitant.
2. The production method of the high-efficiency low-emission silent cracking agent for the production of the Z-shaped concrete hollow block according to claim 1 is characterized by comprising the following specific steps:
the composite material is prepared from 18 parts by mass of anhydrous polyurethane resin, 10 parts by mass of straw extract, 5 parts by mass of calcium oxide, 60 parts by mass of portland cement, 6 parts by mass of water reducing agent, 7 parts by mass of phase-change material and 1.5 parts by mass of excitant.
3. The method for producing the high-efficiency low-emission silent cracking agent for the production of the Z-shaped concrete hollow block according to claim 1 or 2, which is characterized in that: the anhydrous polyurethane resin is prepared from the following components in parts by weight: 5-10 parts of polyisocyanate, 12-18 parts of polyester polyol, 1-3 parts of sodium sulfonate, 3-9 parts of dimethylethanolamine and 80-100 parts of water; the preparation method comprises the following specific steps: after being mixed, the raw materials are firstly dried for 20-30min by hot air at 60-80 ℃, and then are dehydrated in vacuum at 100-140 ℃ to ensure that the water content is less than 0.02 percent.
4. The production method of the high-efficiency low-emission silent breaking agent for the production of the Z-shaped concrete hollow block according to claim 3, wherein the anhydrous polyurethane resin is prepared from the following components in parts by mass: 8 parts of polyisocyanate, 14 parts of polyester polyol, 2 parts of sodium sulfonate, 6 parts of dimethylethanolamine and 90 parts of water.
5. The method for producing the high-efficiency low-emission silent cracking agent for the production of the Z-shaped concrete hollow block according to claim 1 or 2, which is characterized in that: the phase change material is sodium thiosulfate pentahydrate.
6. The production method of the high-efficiency low-emission silent cracking agent for the production of the Z-shaped concrete hollow block according to the claim 1 or 2, characterized in that the exciting agent is prepared by mixing normalized lime and sodium carbonate according to the mass ratio of 1: 3-5.
7. The method for producing the high-efficiency low-emission silent cracking agent for the production of the Z-shaped concrete hollow block according to claim 6, which is characterized in that: the exciting agent is prepared by mixing normalized lime and sodium carbonate according to the mass ratio of 1: 4.
8. The method for producing the high-efficiency low-emission silent cracking agent for the production of the Z-shaped concrete hollow block according to claim 1 or 2, which is characterized in that: the water reducing agent is prepared from sulfamate and lignosulfonate according to a mass ratio of 1: 5-8, and mixing.
9. The method for producing the high-efficiency low-emission silent cracking agent for the production of the Z-shaped concrete hollow block according to claim 8, which is characterized in that: the water reducing agent is prepared from sulfamate and lignosulfonate according to a mass ratio of 1: 7 mixing to obtain the product.
10. The production method of the high-efficiency low-emission silent cracking agent for the production of the Z-shaped concrete hollow block according to claim 1 or 2, wherein the preparation method of the straw extract specifically comprises the following steps:
(1) taking straws, cleaning and drying the straws until the water content is below 5%, crushing the straws into 40 meshes, adding 2 times of the straw by mass of enzymolysis liquid, carrying out enzymolysis for 30min at 30-35 ℃, and filtering to obtain filtrate and filter residues;
(2) adding 3 times of 75% ethanol solution of the filter residue in parts by weight into the filter residue, performing shake ethanol extraction at 300r/min for 20min, separating ethanol extract, and recovering ethanol to obtain extract;
(3) and uniformly mixing the filtrate and the extracting solution, then sterilizing at high temperature, and secondarily filtering to remove impurities.
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