CN111362642A - Mortar containing recycled aggregate - Google Patents
Mortar containing recycled aggregate Download PDFInfo
- Publication number
- CN111362642A CN111362642A CN202010267373.0A CN202010267373A CN111362642A CN 111362642 A CN111362642 A CN 111362642A CN 202010267373 A CN202010267373 A CN 202010267373A CN 111362642 A CN111362642 A CN 111362642A
- Authority
- CN
- China
- Prior art keywords
- recycled aggregate
- parts
- aggregate
- mortar
- calcium carbonate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the technical field of building materials, and relates to mortar containing recycled aggregate, which comprises the following components in parts by weight: 15-20 parts of water; 20-30 parts of Portland cement; 30-40 parts of recycled aggregate; 60-80 parts of natural aggregate; 15-20 parts of nano calcium carbonate; 10-15 parts of micro silicon powder; 1-3 parts of zirconium naphthenate. Also relates to a preparation method of the mortar containing recycled aggregate, which comprises the following steps: step (1), recycled aggregate pretreatment: mixing the recycled aggregate, the nano calcium carbonate, the micro silicon powder and the zirconium naphthenate uniformly to obtain a premix; step (2), mixing: sequentially adding the portland cement, water, the premix and the natural aggregate into a reaction vessel, and uniformly stirring and mixing to obtain the mortar containing the recycled aggregate. The invention has the effect that the recycled aggregate is not easy to influence the compressive strength and the flexural strength of the hardened mortar.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to mortar containing recycled aggregate.
Background
At present, along with the development of the urbanization process of China, the discharge amount of building garbage is increased year by year, however, most buildings are transported to the suburbs or the periphery of the city to be simply buried or stockpiled in the open air without any treatment, which wastes land and resources and pollutes the environment; on the other hand, with the increasing population, the demand of houses, sport places and the like is increasing, so that the demand of sandstone aggregates in the construction industry is increasing. Therefore, the construction waste is usually crushed and added to new mortar again as recycled aggregate for recycling.
The existing mortar containing recycled aggregate is generally prepared by simply crushing and screening construction waste to form recycled aggregate, performing strengthening treatment on the recycled aggregate, and uniformly mixing the recycled aggregate and natural aggregate to form new aggregate to be re-mixed into new mortar.
The above prior art solutions have the following drawbacks: the recycled aggregate is easy to cause a large amount of microcracks due to damage accumulation in the recycled aggregate in the crushing process, so that the recycled aggregate has high porosity, high water absorption and low bulk density, and the compressive strength of the hardened mortar is easy to reduce, therefore, the recycled aggregate still has room for improvement.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a mortar containing recycled aggregate.
Aiming at the defects in the prior art, the invention also aims to provide a preparation method of the mortar containing the recycled aggregate.
One of the above objects of the present invention is achieved by the following technical solutions:
a mortar containing recycled aggregate comprises the following components in parts by weight:
15-20 parts of water;
20-30 parts of Portland cement;
30-40 parts of recycled aggregate;
60-80 parts of natural aggregate;
15-20 parts of nano calcium carbonate;
10-15 parts of micro silicon powder;
1-3 parts of zirconium naphthenate.
By adopting the technical scheme, the nanometer calcium carbonate, the micro silicon powder and the zirconium naphthenate are matched with each other in a synergistic manner, the zirconium naphthenate is favorable for better improving the flowability of the nanometer calcium carbonate, the micro silicon powder and the zirconium naphthenate, so that the nanometer calcium carbonate and the micro silicon powder are more difficult to agglomerate, the nanometer calcium carbonate and the micro silicon powder are more easily permeated into gaps of the recycled aggregate to repair the recycled aggregate, the compactness of the recycled aggregate is higher, the porosity and the water absorption of the recycled aggregate are better reduced, the compressive strength and the flexural strength of the hardened mortar are further improved, the recycled aggregate is more widely applied to the preparation of the mortar with higher strength requirement, and the resource problem of the gravel aggregate is better solved.
Meanwhile, the nano calcium carbonate and the silica fume are also beneficial to better filling the stacking gap between the recycled aggregate and the natural aggregate, so that the stacking density of the aggregate in the prepared mortar is higher, the compactness of the prepared mortar after hardening is better improved, the compressive strength and the flexural strength of the mortar after hardening are more difficult to influence, the recycled aggregate is more widely applied to the mortar with higher strength requirement, and the resource problem of the sandstone aggregate is better solved.
The present invention in a preferred example may be further configured to: the particle size of the micro silicon powder is 0.1-0.5 μm.
By adopting the technical scheme, by controlling the particle size of the silica fume, the silica fume and the nano calcium carbonate are favorably cooperated and matched with each other better, the use amount of the nano calcium carbonate is favorably reduced, so that the position with larger pores in the recycled aggregate is more easily filled and compacted while the cost is saved, the compactness of the recycled aggregate is favorably improved, the porosity and the water absorption rate of the recycled aggregate are lower, the compressive strength and the flexural strength of the mortar prepared by the recycled aggregate after hardening are further less easily influenced, the recycled aggregate is favorably and widely applied to the preparation of the mortar with higher strength requirement, and the resource problem of the sandstone aggregate is favorably solved better.
The present invention in a preferred example may be further configured to: the recycled aggregate is prepared by mixing construction waste with the particle sizes of 1-3mm, 5-10mm and 11-15mm in a mass portion ratio of 6-8:1-3: 1.
By adopting the technical scheme, the recycled aggregate is formed by matching the building wastes in a specific proportion, so that the stacking density of the recycled aggregate is favorably improved, the compactness of the prepared mortar is higher, the compressive strength and the flexural strength of the hardened prepared mortar are more difficult to influence, the recycled aggregate is favorably and widely applied to the preparation of the mortar with higher strength requirement, and the resource problem of the gravel aggregate is better solved.
The present invention in a preferred example may be further configured to: the natural aggregate comprises the following components in parts by mass:
40-50 parts of stone;
10-15 parts of sand;
5-7 parts of fly ash;
5-8 parts of mineral powder.
By adopting the technical scheme, the natural aggregate is formed by matching the stones, the sand, the fly ash and the mineral powder in a specific proportion, so that the natural aggregate is favorably and intensively accumulated with the recycled aggregate, the compactness of the prepared mortar is higher, the compressive strength and the flexural strength of the hardened mortar are more difficultly influenced, the recycled aggregate is favorably and widely applied to the preparation of the mortar with higher strength requirement, and the resource problem of the gravel aggregate is better solved.
The present invention in a preferred example may be further configured to: the paint also comprises the following components in parts by mass:
1-2 parts of fatty alcohol-polyoxyethylene ether.
By adopting the technical scheme, the addition of the fatty alcohol-polyoxyethylene ether is favorable for better improving the fluidity of the nano calcium carbonate and the micro silicon powder, so that the nano calcium carbonate and the micro silicon powder can better penetrate into gaps of the recycled aggregate to repair the recycled aggregate, the porosity of the recycled aggregate is lower, the compressive strength and the flexural strength of the hardened mortar are further less susceptible, the recycled aggregate can be more widely applied to the preparation of the mortar with higher strength requirement, and the resource problem of the sandstone aggregate can be better solved; meanwhile, the nano calcium carbonate and the micro silicon powder are favorable for better filling the stacking gap between the recycled aggregate and the natural aggregate, so that the compactness of the prepared mortar is higher, and the compressive strength and the flexural strength of the prepared mortar are favorably improved.
The present invention in a preferred example may be further configured to: the paint also comprises the following components in parts by mass:
0.3-0.5 part of dimethyl glutarate.
By adopting the technical scheme, through adding dimethyl glutarate, the synergistic cooperation of nano calcium carbonate, micro silicon powder and zirconium naphthenate is favorably promoted, so that the nano calcium carbonate and the micro silicon powder are less prone to caking, the nano calcium carbonate and the micro silicon powder are favorably and better penetrated into gaps of the recycled aggregate to repair the recycled aggregate, the compactness of the recycled aggregate is improved, the compressive strength and the flexural strength of the prepared mortar after hardening are less prone to being influenced, the recycled aggregate is favorably and widely applied to the preparation of the mortar with higher strength requirement, and the resource problem of the sandstone aggregate is better solved; meanwhile, the nano calcium carbonate and the micro silicon powder are favorable for better filling the stacking gap between the recycled aggregate and the natural aggregate, so that the compactness of the prepared mortar is higher, and the compressive strength and the flexural strength of the prepared mortar are favorably improved.
The present invention in a preferred example may be further configured to: the paint also comprises the following components in parts by mass:
1-2 parts of hollow glass beads.
By adopting the technical scheme, the hollow glass beads are added, so that the pores of the recycled aggregate can be better filled and repaired, the porosity and the water absorption of the recycled aggregate are reduced, and the compressive strength and the flexural strength of the hardened mortar are less susceptible; in addition, the hollow glass beads are beneficial to better improving the sound insulation and heat preservation effects and the weight reduction effects of the hardened mortar, and are beneficial to better saving materials, so that the production cost is reduced.
The present invention in a preferred example may be further configured to: the particle size of the hollow glass bead is 5-10 μm.
By adopting the technical scheme, the particle size of the hollow glass microspheres is controlled, so that the hollow glass microspheres are favorably matched with the nano calcium carbonate and the micro silicon powder in a synergistic manner to fill and repair the recycled aggregate, the porosity and the water absorption of the recycled aggregate are lower, the compressive strength and the flexural strength of the hardened mortar are more difficult to influence, the recycled aggregate is favorably and widely applied to the preparation of the mortar with higher strength requirement, and the problem of the gravel aggregate is better solved; meanwhile, the micron-level hollow glass beads, the nano calcium carbonate and the silica fume are matched with each other in a synergistic manner, so that the use amount of the nano calcium carbonate is reduced better, the cost is saved better, the positions, with larger gaps, in the recycled aggregate and between the natural aggregate and the recycled aggregate are filled and compacted better, the compactness of the recycled aggregate is improved, the stacking density of the recycled aggregate and the natural aggregate is improved better, the compression strength and the breaking strength of the prepared mortar after being hardened are not influenced easily, the recycled aggregate is applied to the preparation of the mortar with higher strength requirement more widely, and the resource problem of the sandstone aggregate is solved better.
The present invention in a preferred example may be further configured to: the paint also comprises the following components in parts by mass:
0.1-0.3 part of oleic acid.
By adopting the technical scheme, the oleic acid and the hollow glass microspheres are added to be matched with each other in a synergistic manner, so that the flowability of the hollow glass microspheres is favorably improved, the hollow glass microspheres are favorably and better seeped into gaps of the recycled aggregate to repair the recycled aggregate, the porosity and the water absorption of the recycled aggregate are lower, the compressive strength and the flexural strength of the hardened mortar are more difficult to influence, and the resource problem of the gravel aggregate is favorably solved.
The second aim of the invention is realized by the following technical scheme:
a preparation method of mortar containing recycled aggregate comprises the following steps:
step (1), recycled aggregate pretreatment: mixing the recycled aggregate, the nano calcium carbonate, the micro silicon powder and the zirconium naphthenate uniformly to obtain a premix;
step (2), mixing: sequentially adding the portland cement, water, the premix and the natural aggregate into a reaction vessel, and uniformly stirring and mixing to obtain the mortar containing the recycled aggregate.
By adopting the technical scheme, the recycled aggregate is firstly uniformly mixed with the nano calcium carbonate, the micro silicon powder and the zirconium naphthenate pickaxe, and then the residual components are mixed, so that the strength of the recycled aggregate can be better restored by the nano calcium carbonate, the micro silicon powder and the zirconium naphthenate, and the compressive strength and the flexural strength of the prepared hardened mortar are not easily influenced.
In summary, the invention includes at least one of the following beneficial technical effects:
1. by adopting the synergistic cooperation of the nano calcium carbonate, the silica fume and the zirconium naphthenate, the nano calcium carbonate and the silica fume can more easily permeate into gaps of the recycled aggregate to repair the recycled aggregate, so that the compressive strength and the flexural strength of the hardened mortar can be better improved for the recycled aggregate, the recycled aggregate can be more widely applied to the preparation of the mortar with higher strength requirement, and the resource problem of the sandstone aggregate can be better solved;
2. the nano calcium carbonate and the micro silicon powder are also beneficial to better filling the stacking gap between the recycled aggregate and the natural aggregate, so that the stacking density of the aggregate in the prepared mortar is higher, the compressive strength and the flexural strength of the hardened mortar are more difficult to influence, the recycled aggregate is more widely applied to the mortar with higher strength requirement, and the resource problem of the sandstone aggregate is better solved;
3. the building waste in a specific proportion is matched to form the recycled aggregate, so that the stacking density of the recycled aggregate is favorably improved, the porosity and the water absorption of the mortar are favorably reduced, the compressive strength and the flexural strength of the prepared mortar after hardening are more difficult to influence, the application universality of the recycled aggregate is favorably improved, and the resource problem of the gravel aggregate is better solved;
4. by adding dimethyl glutarate, the synergistic cooperation of nano calcium carbonate, micro silicon powder and zirconium naphthenate is favorably promoted, so that the compressive strength and the flexural strength of the hardened mortar are not easily influenced, the recycled aggregate is favorably and widely applied to the mortar with higher strength requirement, and the resource problem of the gravel aggregate is better solved.
Drawings
FIG. 1 is a process flow diagram of a method of preparing a recycled aggregate-containing mortar of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
In the following examples, portland cement manufactured by nyi co-construction materials ltd of the mountain of buddha, model number P.O 42.5.5R, was used.
In the following examples, the nano calcium carbonate is 471-34-1 type nano calcium carbonate from Jinghuang science and technology Limited, Shijiazhuang.
In the following examples, the silica fume was silica fume from shanghai henghai chemical company, ltd.
In the following examples, the zirconium naphthenate used was 72854-21-8 model number from Guanao Biotech GmbH, Hubei.
In the following examples, 35-40mm macadam from Wanyuan Industrial and trade building materials sales Co., Ltd, Yixian county was used.
In the following examples, river sand having a particle size of 10 to 20 mesh, obtained from a processing plant for Zetong mineral products, Lingshou prefecture, was used as the sand.
In the following examples, the fly ash is a grade xy101 fly ash from balindexxin source mining company, ltd.
In the following examples, ore powder of xy15 from Berlin Dexin Yuan mining company Limited is used.
In the following examples, fatty alcohol polyoxyethylene ether available from Nantong Yinxun chemical Co., Ltd under the designation 9002-92-0 is used.
In the following examples, dimethyl glutarate was ZiboXinrong chemical technology Co., Ltd, which was 1119-40-0.
In the following examples, hollow glass beads were prepared from Cinese products of mineral processing Co., Ltd, Lingshu county.
In the following examples, oleic acid from commercial products of Jinan Jikang beer, Inc. under the trade number 112-80-1 was used.
Example 1
Referring to fig. 1, the invention discloses a preparation method of mortar containing recycled aggregate, which comprises the following steps:
step (1), the recycled aggregate is pretreated, specifically as follows:
35kg of recycled aggregate, 20kg of nano calcium carbonate, 12.5kg of micro silicon powder and 1kg of zirconium naphthenate are added into a sand-stone stirrer and are stirred and mixed uniformly to obtain the premix.
And (2) mixing, specifically comprising the following steps:
and (2) sequentially adding 30kg of Portland cement, 20kg of water, the premix obtained in the step (1) and 60kg of natural aggregate into a 200L stirring kettle, and uniformly stirring and mixing to obtain the mortar containing the recycled aggregate.
In the embodiment, the recycled aggregate is prepared by mixing construction waste with the particle sizes of 1-3mm, 5-10mm and 11-15mm according to the mass ratio of 5: 4:1, and mixing uniformly.
In this example, the particle size of the silica fume is 0.05 to 0.1 μm.
In this example, the natural aggregate was uniformly mixed with 37kg of stone, 16kg of sand, 4kg of fly ash and 3kg of mineral powder.
Example 2
The difference from example 1 is that:
the amount of each component added in the preparation process of the mortar containing the recycled aggregate is as follows:
40kg of recycled aggregate; 15kg of nano calcium carbonate; 15kg of micro silicon powder; 2kg of zirconium naphthenate; 20kg of Portland cement; 17.5kg of water; 70kg of natural aggregate.
In this example, the natural aggregate was uniformly mixed with 51kg of stone, 8kg of sand, 9kg of fly ash and 2kg of ore powder.
Example 3
The difference from example 1 is that:
the amount of each component added in the preparation process of the mortar containing the recycled aggregate is as follows:
30kg of recycled aggregate; 17.5kg of nano calcium carbonate; 10kg of micro silicon powder; 3kg of zirconium naphthenate; 25kg of Portland cement; 15kg of water; 80kg of natural aggregate.
In this example, the natural aggregate was uniformly mixed with 55kg of stone, 7kg of sand, 4kg of fly ash and 14kg of mineral powder.
Example 4
The difference from example 1 is that:
the amount of each component added in the preparation process of the mortar containing the recycled aggregate is as follows:
36kg of recycled aggregate; 16kg of nano calcium carbonate; 11kg of micro silicon powder; 2.5kg of zirconium naphthenate; 22kg of Portland cement; 18kg of water; 75kg of natural aggregate.
In this example, the natural aggregate was prepared by uniformly mixing 52kg of stone, 17kg of sand, 2kg of fly ash and 4kg of mineral powder.
Example 5
The difference from example 4 is that: the particle size of the micro silicon powder is 0.6-0.7 μm.
Example 6
The difference from example 4 is that: the particle size of the micro silicon powder is 0.1-0.5 μm.
Example 7
The difference from example 4 is that: the recycled aggregate is prepared from construction waste with the grain size of 1-3mm, 5-10mm and 11-15mm according to the mass ratio of 8.5: 0.5: 1.
Example 8
The difference from example 4 is that: the recycled aggregate is prepared from construction waste with the grain sizes of 1-3mm, 5-10mm and 11-15mm according to the mass ratio of 6: the ratio of 3: 1.
Example 9
The difference from example 4 is that: the recycled aggregate is prepared from construction waste with the particle size of 1-3mm, 5-10mm and 11-15mm according to the mass ratio of 7: 2:1, and mixing uniformly.
Example 10
The difference from example 4 is that: the recycled aggregate is prepared from construction waste with the grain size of 1-3mm, 5-10mm and 11-15mm according to the mass ratio of 8: 1:1, and mixing uniformly.
Example 11
The difference from example 4 is that: the recycled aggregate is prepared from construction waste with the grain size of 1-3mm, 5-10mm and 11-15mm according to the mass ratio of 7.5: 1.5: 1.
Example 12
The difference from example 4 is that: the natural aggregate is prepared by uniformly mixing 40kg of stones, 15kg of sand, 7kg of fly ash and 8kg of mineral powder.
Example 13
The difference from example 4 is that: the natural aggregate is prepared by uniformly mixing 45kg of stones, 12.5kg of sand, 6kg of fly ash and 6.5kg of mineral powder.
Example 14
The difference from example 4 is that: the natural aggregate is prepared by uniformly mixing 50kg of stones, 10kg of sand, 5kg of fly ash and 5kg of mineral powder.
Example 15
The difference from example 4 is that: the natural aggregate is prepared by uniformly mixing 46kg of stones, 11kg of sand, 5.5kg of fly ash and 7kg of mineral powder.
Example 16
The difference from example 15 is that: the natural aggregate adopts equal amount of sand instead of stone.
Example 17
The difference from example 15 is that: the natural aggregate adopts the same amount of fly ash to replace sand.
Example 18
The difference from example 15 is that: the natural aggregate adopts equal amount of mineral powder to replace fly ash.
Example 19
The difference from example 15 is that: the natural aggregate adopts the same amount of fly ash to replace mineral powder.
Example 20
The difference from example 4 is that: 1kg of fatty alcohol-polyoxyethylene ether is also added in the step (1).
Example 21
The difference from example 4 is that: 1.5kg of fatty alcohol-polyoxyethylene ether is also added in the step (1).
Example 22
The difference from example 4 is that: 2kg of fatty alcohol-polyoxyethylene ether is also added in the step (1).
Example 23
The difference from example 4 is that: 1.8kg of fatty alcohol-polyoxyethylene ether is also added in the step (1).
Example 24
The difference from example 4 is that: 0.3kg of dimethyl glutarate is also added in the step (1).
Example 25
The difference from example 4 is that: 0.4kg of dimethyl glutarate is also added in the step (1).
Example 26
The difference from example 4 is that: 0.5kg of dimethyl glutarate is also added in the step (1).
Example 27
The difference from example 4 is that: 0.35kg of dimethyl glutarate is also added in the step (1).
Example 28
The difference from example 4 is that: 1kg of hollow glass beads are also added in the step (1).
In this example, the hollow glass beads had a particle size of 5 μm.
Example 29
The difference from example 4 is that: 1.5kg of hollow glass beads are also added in the step (1).
In this example, the hollow glass microspheres had a particle size of 7 μm.
Example 30
The difference from example 4 is that: 2kg of hollow glass beads are also added in the step (1).
In this example, the hollow glass microspheres had a particle size of 10 μm.
Example 31
The difference from example 4 is that: 1.7kg of hollow glass beads are also added in the step (1).
In this example, the hollow glass beads had a particle size of 8 μm.
Example 32
The difference from example 31 is that: the particle size of the hollow glass beads was 3 μm.
Example 33
The difference from example 31 is that: the particle size of the hollow glass beads was 11 μm.
Example 34
The difference from example 4 is that: 0.1kg of oleic acid is also added in the step (1).
Example 35
The difference from example 4 is that: 0.3kg of oleic acid is also added in the step (1).
Example 36
The difference from example 4 is that: 1kg of hollow glass beads and 0.3kg of oleic acid are also added in the step (1).
In this example, the hollow glass beads had a particle size of 8 μm.
Example 37
The difference from example 4 is that: in the step (1), 1.5kg of hollow glass beads and 0.2kg of oleic acid are also added.
In this example, the hollow glass beads had a particle size of 8 μm.
Example 38
The difference from example 4 is that: in the step (1), 2kg of hollow glass beads and 0.1kg of oleic acid are also added.
In this example, the hollow glass beads had a particle size of 8 μm.
Example 39
The difference from example 4 is that: in the step (1), 1.6kg of hollow glass beads and 0.25kg of oleic acid are also added.
In this example, the hollow glass beads had a particle size of 8 μm.
Example 40
The difference from example 4 is that:
the natural aggregate is prepared by uniformly mixing 40kg of stones, 15kg of sand, 7kg of fly ash and 8kg of mineral powder.
1kg of fatty alcohol-polyoxyethylene ether, 0.5kg of dimethyl glutarate, 1.5kg of hollow glass beads and 0.1kg of oleic acid are also added in the step (1).
In this example, the hollow glass beads had a particle size of 8 μm.
EXAMPLE 41
The difference from example 4 is that:
the natural aggregate is prepared by uniformly mixing 45kg of stones, 12.5kg of sand, 6kg of fly ash and 6.5kg of mineral powder.
1.5kg of fatty alcohol-polyoxyethylene ether, 0.3kg of dimethyl glutarate, 2kg of hollow glass beads and 0.2kg of oleic acid are also added in the step (1).
Example 42
The difference from example 4 is that:
the natural aggregate is prepared by uniformly mixing 50kg of stones, 10kg of sand, 5kg of fly ash and 5kg of mineral powder.
In the step (1), 2kg of fatty alcohol-polyoxyethylene ether, 0.4kg of dimethyl glutarate, 1kg of hollow glass beads and 0.3kg of oleic acid are also added.
Example 43
The difference from example 4 is that:
the natural aggregate is prepared by uniformly mixing 46kg of stones, 11kg of sand, 5.5kg of fly ash and 7kg of mineral powder.
1.7kg of fatty alcohol-polyoxyethylene ether, 0.35kg of dimethyl glutarate, 1.6kg of hollow glass beads and 0.25kg of oleic acid are also added in the step (1).
Comparative example 1
The difference from example 4 is that: the same amount of portland cement is used to replace nanometer calcium carbonate, silica fume and zirconium naphthenate.
Comparative example 2
The difference from example 4 is that: the same amount of portland cement is used to replace nano calcium carbonate.
Comparative example 3
The difference from example 4 is that: the same amount of portland cement is used to replace silica fume.
Comparative example 4
The difference from example 4 is that: an equal amount of portland cement was used instead of zirconium naphthenate.
Comparative example 5
The difference from example 4 is that:
the amounts of the components added in step (1) were as follows:
14kg of nano calcium carbonate; 16kg of micro silicon powder; 0.5kg of zirconium naphthenate.
Comparative example 6
The difference from example 4 is that:
the amounts of the components added in step (1) were as follows:
21kg of nano calcium carbonate; 9kg of micro silicon powder; 3.5kg of zirconium naphthenate.
Experiment 1
200g of the premix prepared in the step (1) of each of the above examples and comparative examples was taken, and then a concrete compression-fracture tester was used to apply pressure to each of the premix samples, and the pressure (kN) applied when the premix samples were crushed was recorded. The concrete compression and bending resistance testing machine adopts a concrete compression and bending resistance testing machine which is of type TYE of LusiTuo Hebei detection technology service Limited company.
Experiment 1
The 28d compressive strength (MPa) of the mortar containing recycled aggregate prepared in the above examples and comparative examples was measured according to the compressive strength test in GB/T50081-2002 Standard test methods for mechanical Properties of ordinary concrete.
Experiment 2
The 28d flexural strength (MPa) of the mortar containing recycled aggregate prepared in the above examples and comparative examples was measured according to the flexural strength test in GB/T50081-2002 Standard test methods for mechanical Properties of general concrete.
The data from the above experiments are shown in Table 1.
TABLE 1
According to the comparison of the data of the embodiments 4 to 6 in the table 1, by controlling the particle size of the silica fume, the silica fume and the nano calcium carbonate are favorably cooperated with each other to fill and repair the recycled aggregate, so that the compactness of the recycled aggregate is improved, the compressive strength and the flexural strength of the prepared mortar are favorably improved, the recycled aggregate is favorably applied to the preparation of the mortar with higher strength requirement, and the resource problem of the sandstone aggregate is favorably solved.
According to the comparison of the data of the embodiment 4 and the embodiments 7 to 11 in the table 1, the better stacking and the dense accumulation of the recycled aggregate and the natural aggregate are facilitated by controlling the mixing proportion of the construction wastes with different particle sizes, so that the compactness of the prepared mortar is higher, the compressive strength and the flexural strength of the hardened mortar are better improved, the compressive strength and the flexural strength of the mortar are less susceptible to the influence of the recycled aggregate, the wider application of the recycled aggregate is facilitated, and the resource problem of the sandstone aggregate is better solved.
According to the comparison of the data of the example 4 and the examples 12 to 19 in the table 1, the natural aggregate and the recycled aggregate can be better densely stacked by controlling the composition of the natural aggregate and the dosage proportion of each component, so that the compactness of the prepared mortar is improved, the compressive strength and the flexural strength of the hardened mortar can be better improved, the recycled aggregate can be more widely applied, the performance of the mortar can better meet the practical requirement, and the resource problem of the sandstone aggregate can be better solved.
According to comparison of data of the embodiment 4 and the embodiments 20 to 23 in the table 1, the fatty alcohol-polyoxyethylene ether is added, so that the fluidity of the nano calcium carbonate and the micro silicon powder is favorably improved, the nano calcium carbonate and the micro silicon powder are less prone to caking, the nano calcium carbonate and the micro silicon powder are favorably and better permeated into gaps of the recycled aggregate to repair the recycled aggregate, the recycled aggregate is less prone to influencing the compressive strength and the flexural strength of the hardened mortar, the recycled aggregate is wider in application in preparation of the mortar with higher strength requirement, and the resource problem of the gravel aggregate is favorably solved; meanwhile, the method is favorable for filling pores between the recycled aggregate and the natural aggregate better by the nano calcium carbonate and the micro silicon powder, so that the prepared mortar has higher compactness, and the compressive strength and the flexural strength of the prepared mortar are favorably improved better.
According to comparison of data of the embodiment 4 and the embodiments 24 to 27 in the table 1, dimethyl glutarate is added, so that the synergistic cooperation of nano calcium carbonate, micro silicon powder and zirconium naphthenate is favorably promoted, the flowability of the nano calcium carbonate and the fluidity of the micro silicon powder are stronger, the nano calcium carbonate and the micro silicon powder are more easily permeated into gaps in the recycled aggregate to repair the recycled aggregate, the recycled aggregate is less likely to influence the compressive strength and the flexural strength of the hardened mortar, the recycled aggregate is favorably and widely applied to the preparation of the mortar with higher strength requirement, and the resource problem of the sandstone aggregate is favorably solved; meanwhile, the method is favorable for filling pores between the recycled aggregate and the natural aggregate better by the nano calcium carbonate and the micro silicon powder, so that the prepared mortar has higher compactness, and the compressive strength and the flexural strength of the prepared mortar are favorably improved better.
According to comparison of the data of the embodiment 4 and the embodiments 28 to 33 in the table 1, by controlling the particle size of the hollow glass beads, the hollow glass beads are favorably matched with the nano calcium carbonate and the micro silicon powder in a better cooperation manner to fill and repair the pores of the recycled aggregate, so that the porosity and the water absorption of the recycled aggregate are reduced, the compressive strength and the flexural strength of the hardened mortar are less easily influenced by the recycled aggregate, the application of the recycled aggregate in the preparation of the mortar with higher strength requirement is favorably expanded, and the resource problem of the gravel aggregate is favorably solved; meanwhile, the method is beneficial to reducing the dosage of the nano calcium carbonate so as to better save the production cost.
According to comparison of data of the embodiment 4, the embodiments 28 to 31 and the embodiments 34 to 39 in the table 1, the hollow glass beads are independently added, so that the hollow glass beads are favorably matched with the nano calcium carbonate and the micro silicon powder in a synergistic manner to fill and repair the pores of the recycled aggregate to a certain extent, the compressive strength and the flexural strength of the hardened mortar are less easily affected, the recycled aggregate is favorably and better applied to the preparation of the mortar with higher strength requirement, and the resource problem of the sand aggregate is better solved; the oleic acid is added independently, so that the compressive strength and the flexural strength of the hardened mortar are hardly influenced, and the compressive strength and the flexural strength of the hardened mortar can be better improved only when the hollow glass beads and the oleic acid are cooperatively matched, so that the recycled aggregate is better applied to the preparation of the mortar with higher strength requirement, and the resource problem of the gravel aggregate is better solved.
According to the data comparison of the example 4 and the comparative examples 1 to 6 in the table 1, the recycled aggregate can be better repaired only when the nano calcium carbonate, the micro silicon powder and the zirconium naphthenate are cooperatively matched with each other in a specific proportion, so that the compressive strength and the flexural strength of the hardened mortar are less susceptible to influence, the resource problem of the sandstone aggregate is better solved while the recycled aggregate is favorably applied to the preparation of the mortar with higher strength requirement, and the strength of the recycled aggregate and the compressive strength and the flexural strength of the prepared mortar are easily influenced greatly due to the lack of any component or the change of any proportion.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. A mortar containing recycled aggregate is characterized in that: the paint comprises the following components in parts by mass:
15-20 parts of water;
20-30 parts of Portland cement;
30-40 parts of recycled aggregate;
60-80 parts of natural aggregate;
15-20 parts of nano calcium carbonate;
10-15 parts of micro silicon powder;
1-3 parts of zirconium naphthenate.
2. The recycled aggregate-containing mortar according to claim 1, wherein: the particle size of the micro silicon powder is 0.1-0.5 μm.
3. The recycled aggregate-containing mortar according to claim 1, wherein: the recycled aggregate is prepared by mixing construction waste with the particle sizes of 1-3mm, 5-10mm and 11-15mm in a mass portion ratio of 6-8:1-3: 1.
4. The recycled aggregate-containing mortar according to claim 3, wherein: the natural aggregate comprises the following components in parts by mass:
40-50 parts of stone;
10-15 parts of sand;
5-7 parts of fly ash;
5-8 parts of mineral powder.
5. The recycled aggregate-containing mortar according to any one of claims 1 to 4, wherein: the paint also comprises the following components in parts by mass:
1-2 parts of fatty alcohol-polyoxyethylene ether.
6. The recycled aggregate-containing mortar according to any one of claims 1 to 4, wherein: the paint also comprises the following components in parts by mass:
0.3-0.5 part of dimethyl glutarate.
7. The recycled aggregate-containing mortar according to any one of claims 1 to 4, wherein: the paint also comprises the following components in parts by mass:
1-2 parts of hollow glass beads.
8. The recycled aggregate-containing mortar according to claim 7, wherein: the particle size of the hollow glass bead is 5-10 μm.
9. The recycled aggregate-containing mortar according to claim 7, wherein: the paint also comprises the following components in parts by mass:
0.1-0.3 part of oleic acid.
10. A method for preparing a recycled aggregate-containing mortar as claimed in any one of claims 1 to 9, wherein: the method comprises the following steps:
step (1), recycled aggregate pretreatment: mixing the recycled aggregate, the nano calcium carbonate, the micro silicon powder and the zirconium naphthenate uniformly to obtain a premix;
step (2), mixing: sequentially adding the portland cement, water, the premix and the natural aggregate into a reaction vessel, and uniformly stirring and mixing to obtain the mortar containing the recycled aggregate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010267373.0A CN111362642A (en) | 2020-04-08 | 2020-04-08 | Mortar containing recycled aggregate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010267373.0A CN111362642A (en) | 2020-04-08 | 2020-04-08 | Mortar containing recycled aggregate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111362642A true CN111362642A (en) | 2020-07-03 |
Family
ID=71203140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010267373.0A Pending CN111362642A (en) | 2020-04-08 | 2020-04-08 | Mortar containing recycled aggregate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111362642A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11199298A (en) * | 1998-01-08 | 1999-07-27 | Ohbayashi Corp | Production of concrete using regenerated aggregate |
| CN106542759A (en) * | 2016-12-09 | 2017-03-29 | 新昌县永佳耐火材料厂 | A kind of mortar anti-blushing agent |
| CN108264363A (en) * | 2018-01-24 | 2018-07-10 | 合肥铭佑高温技术有限公司 | A kind of compound alumina firebrick and preparation method thereof |
| CN110104997A (en) * | 2019-04-26 | 2019-08-09 | 四川衡鼎建材有限公司 | A kind of regeneration concrete and its production technology |
| CN110282930A (en) * | 2019-07-10 | 2019-09-27 | 广州市建筑集团混凝土有限公司 | Regeneration concrete |
| CN110696180A (en) * | 2019-10-08 | 2020-01-17 | 广东乾兴建设工程有限公司 | Concrete prefabricated wallboard and production process thereof |
-
2020
- 2020-04-08 CN CN202010267373.0A patent/CN111362642A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11199298A (en) * | 1998-01-08 | 1999-07-27 | Ohbayashi Corp | Production of concrete using regenerated aggregate |
| CN106542759A (en) * | 2016-12-09 | 2017-03-29 | 新昌县永佳耐火材料厂 | A kind of mortar anti-blushing agent |
| CN108264363A (en) * | 2018-01-24 | 2018-07-10 | 合肥铭佑高温技术有限公司 | A kind of compound alumina firebrick and preparation method thereof |
| CN110104997A (en) * | 2019-04-26 | 2019-08-09 | 四川衡鼎建材有限公司 | A kind of regeneration concrete and its production technology |
| CN110282930A (en) * | 2019-07-10 | 2019-09-27 | 广州市建筑集团混凝土有限公司 | Regeneration concrete |
| CN110696180A (en) * | 2019-10-08 | 2020-01-17 | 广东乾兴建设工程有限公司 | Concrete prefabricated wallboard and production process thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109928685B (en) | Quick-hardening early-strength concrete prepared from various industrial solid wastes and preparation method thereof | |
| CN109704676B (en) | Anti-permeability recycled concrete and preparation method thereof | |
| Herrmann et al. | Structural concrete based on alkali‐activated binders: Terminology, reaction mechanisms, mix designs and performance | |
| CN105777184B (en) | Autoclaved aerated concrete building block adopting ceramic polishing waste and preparation method thereof | |
| CN107226643A (en) | Regenerative pervious concrete material that a kind of full constituent is prepared using building waste and preparation method thereof | |
| CN106007562A (en) | Dry-mixed mortar prepared from construction waste recycled aggregate and preparation method of dry-mixed mortar | |
| CN113735520A (en) | Anti-cracking recycled concrete and preparation method thereof | |
| CN105367026A (en) | High strength concrete and preparation method thereof | |
| CN112341101B (en) | Light recycled concrete and preparation method thereof | |
| CN109665769B (en) | Super early-strength high-performance concrete and preparation method thereof | |
| CN110372232B (en) | Non-shrinkage cementing material prepared from phosphogypsum, preparation method thereof and concrete | |
| CN114180892B (en) | Energy-saving renewable concrete and preparation method thereof | |
| CN107382216A (en) | Fill high-strength concrete of iron tailings and building waste and preparation method thereof | |
| CN114620981A (en) | Sprayed concrete and preparation method and application thereof | |
| CN1915887A (en) | Method for preparing sandwich type ceramic aggregates free from burning by using waste of ceramics | |
| CN111892362A (en) | Building mortar and preparation method thereof | |
| CN110590299A (en) | Low-shrinkage wear-resistant cement concrete road rapid repairing material and preparation method thereof | |
| CN114057454A (en) | Self-compacting quick-setting dry powder mortar and preparation method thereof | |
| CN116835953A (en) | High-strength low-carbon concrete and preparation method thereof | |
| CN110304882B (en) | Phosphogypsum-based polymer iron tailing sand concrete and preparation method thereof | |
| CN111362642A (en) | Mortar containing recycled aggregate | |
| CN111620664A (en) | Non-cement-based ultrahigh-performance concrete and preparation method thereof | |
| CN109336442B (en) | Cement early strength agent and use method thereof | |
| CN111792905A (en) | Limestone tailing filling material and preparation method and application thereof | |
| CN116161929A (en) | Recycled concrete and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20220614 |
|
| AD01 | Patent right deemed abandoned |