CN116535166A - Cement mortar for spheroidal graphite cast iron pipe lining, preparation method of mortar and manufacturing method of lining - Google Patents
Cement mortar for spheroidal graphite cast iron pipe lining, preparation method of mortar and manufacturing method of lining Download PDFInfo
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- CN116535166A CN116535166A CN202310535693.3A CN202310535693A CN116535166A CN 116535166 A CN116535166 A CN 116535166A CN 202310535693 A CN202310535693 A CN 202310535693A CN 116535166 A CN116535166 A CN 116535166A
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- lining
- cement mortar
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- cement
- iron pipe
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- 239000011083 cement mortar Substances 0.000 title claims abstract description 104
- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 43
- 229910001141 Ductile iron Inorganic materials 0.000 title claims abstract description 36
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 238000002360 preparation method Methods 0.000 title abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 28
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 22
- 230000000149 penetrating effect Effects 0.000 claims abstract description 19
- 238000002425 crystallisation Methods 0.000 claims abstract description 17
- 230000008025 crystallization Effects 0.000 claims abstract description 17
- 239000004576 sand Substances 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 16
- 238000005498 polishing Methods 0.000 claims abstract description 10
- 239000004568 cement Substances 0.000 claims description 19
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 17
- 239000000839 emulsion Substances 0.000 claims description 17
- 229910000077 silane Inorganic materials 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 14
- 238000005507 spraying Methods 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 11
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 7
- 229910052710 silicon Inorganic materials 0.000 claims description 7
- 239000010703 silicon Substances 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 6
- 239000003469 silicate cement Substances 0.000 claims description 6
- 239000011398 Portland cement Substances 0.000 claims description 5
- 229920005646 polycarboxylate Polymers 0.000 claims description 4
- DGVVJWXRCWCCOD-UHFFFAOYSA-N naphthalene;hydrate Chemical group O.C1=CC=CC2=CC=CC=C21 DGVVJWXRCWCCOD-UHFFFAOYSA-N 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims 1
- 229910052782 aluminium Inorganic materials 0.000 claims 1
- 238000005336 cracking Methods 0.000 abstract description 17
- 230000007547 defect Effects 0.000 abstract description 8
- 150000004645 aluminates Chemical class 0.000 description 8
- 238000003860 storage Methods 0.000 description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 230000003628 erosive effect Effects 0.000 description 4
- 229910002804 graphite Inorganic materials 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
- C04B2111/00525—Coating or impregnation materials for metallic surfaces
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention discloses cement mortar for a spheroidal graphite cast iron pipe lining, a preparation method of the cement mortar and a manufacturing method of the lining, which relate to the technical field of pipeline lining, and comprise the following components in parts by weight: sand: penetrating crystallization agent: water reducing agent: water = 100 (100-250): (1-2): (0.1-0.2): (35-45), its manufacturing method includes A: uniformly distributing the lining mortar into the nodular cast iron pipe, and centrifugally lining to enable the lining mortar to be attached to the inner wall of the ductile cast iron base material under the action of centrifugal force; b: naturally curing the centrifuged cement mortar lining for 6 hours at 20 ℃, then steam curing for 2-3 hours at 50-80 ℃, steam curing for 2 hours at 70-80 ℃, and polishing to obtain the cement mortar lining after curing. The invention can reduce the cracking and peeling defects of the cement mortar lining and improve the quality of the cement mortar lining of the nodular cast iron pipe.
Description
Technical Field
The application relates to the technical field of pipeline linings, in particular to cement mortar for a ductile cast iron pipe lining, a mortar preparation method and a lining manufacturing method.
Background
The cement mortar lining of the nodular cast iron pipe can generate the defects of cracking and peeling in the storage process.
The cement has volume shrinkage in the hydration process, so the defect of cracking of the cement mortar lining can be caused, the cracking is common to various cement mortar linings, the width of the crack is usually not more than 0.8mm, the crack of the cement mortar lining can gradually heal in the initial stage of pipe water supply, but the cracking of the cement mortar lining can lead the quality impression of the ductile cast iron pipe lining to be poor, and the quality doubt can be easily generated by customers.
The problem of skinning exists in the outdoor storage process of cement, and particularly the skinning phenomenon is serious after the cement is subjected to multiple alternation in rainy days and sunny days. Such skinning is commonly found in high alumina cement mortar liners. The reason is that the high alumina cement mortar lining contains a large amount of soluble substances (the soluble substances are soluble in the solution with the ph of 5-10), when the high alumina cement lining is contacted with rainwater, the lining hole solution ph can reach 11-12, at this time, the soluble substances are dissolved, and after the water volatilizes, the soluble substances are separated again. This is repeated, causing the volume of the soluble in the interstices of the liner to expand, causing the liner to skinning. The skinning can reduce the thickness of the lining, reduce the corrosion resistance of the cement mortar lining, and influence the service life of the high-alumina cement mortar lining.
In order to reduce the defects of cracking, peeling and the like of the cement lining of the ductile cast iron pipe, which cause the quality degradation of the cement lining, and the serious quality defect of the cement lining can shorten the service life of the ductile cast iron pipe, the invention provides a special cement mortar lining production process.
Disclosure of Invention
Aiming at the problems of cement mortar lining, the invention provides ductile iron pipe lining cement mortar, a mortar preparation method and a lining manufacturing method. By adding the penetrating crystallization agent and the water reducing agent into the cement mortar, the compactness of the cement mortar is improved, the volume shrinkage of the cement mortar lining is reduced, and the cracking of the cement mortar lining is reduced; the waterproof material can be sprayed on the surface of the cured cement mortar lining, so that the waterproof performance of the cement mortar lining is improved, the erosion of rainwater to the cement mortar lining is reduced, and the skinning of the cement mortar lining is reduced.
In order to solve the technical problems, the technical scheme is as follows:
on one hand, the spheroidal graphite cast iron pipe lining cement mortar comprises the following components in parts by weight: sand: penetrating crystallization agent: water reducing agent: water = 100 (100-250): (1-2): (0.1-0.2): (35-45).
The invention is further improved in that the components and the weight portions of the cement are as follows: sand: penetrating crystallization agent: water reducing agent: water = 100:190:1:0.1:35.
the invention is further improved in that the components and the weight portions of the cement are as follows: sand: penetrating crystallization agent: water reducing agent: water = 100:220:1:0.1:35.
the invention further improves that the cement is high-alumina cement, and the water reducer is naphthalene water reducer or polycarboxylate water reducer.
The invention further improves that the cement is silicate cement, and the water reducing agent is a polycarboxylic acid water reducing agent.
In still another aspect, a method for preparing the ductile cast iron pipe lining cement mortar comprises the following steps:
sequentially adding sand, ordinary silicate cement, a polycarboxylic acid water reducer and a penetrating crystallizing agent into a mortar stirrer in parts by weight, fully stirring, and then adding water and stirring in parts by weight to obtain lining mortar.
In another aspect, a method for manufacturing a cement mortar liner for a ductile cast iron pipe includes:
a: uniformly distributing the lining mortar of claim 6 into the nodular cast iron pipe, and centrifugally lining to enable the lining mortar to be attached to the inner wall of the ductile iron base material under the action of centrifugal force;
b: naturally curing the centrifuged cement mortar lining for 5-6 hours at 20 ℃, then steam curing for 2-3 hours at 50-70 ℃, steam curing for 2-3 hours at 70-90 ℃, and polishing after curing to obtain the cement mortar lining.
A further improvement of this aspect is that it further comprises:
and spraying silane impregnating solution or organic silicon emulsion on the surface of the polished cement mortar lining to fully wet the cement mortar lining by the silane impregnating solution or organic silicon emulsion.
By adopting the technical scheme, the invention has the following technical progress:
according to the invention, the permeable crystallization agent and the water reducing agent are added into the cement mortar, so that the compactness of the cement mortar is improved, the volume shrinkage of the cement mortar lining is reduced, and the cracking of the cement mortar lining is reduced; the waterproof material can be sprayed on the surface of the cured cement mortar lining, so that the waterproof performance of the cement mortar lining is improved, the erosion of rainwater to the cement mortar lining is reduced, and the skinning of the cement mortar lining is reduced.
The permeable crystal additive is added into the cement mortar lining, so that the cracking can be reduced and repaired, and the compactness of the lining is improved. The permeable crystallization agent product can chemically react with ions in the solution of the inner hole of the concrete to generate water-insoluble crystals and block cracks and pores, and the permeable crystallization agent product is added into the mortar to reduce the cracking defect of the cement mortar lining, improve the compactness of the cement mortar lining and reduce the lining cracking defect caused by water erosion. After the cement mortar lining is cracked later, when the cement mortar lining contacts water, the crack of the lining can be repaired by itself.
The water reducer is added into the cement mortar lining, so that the cracking of the cement mortar lining can be reduced. The water reducing agent can improve the fluidity of the cement mortar, reduce the water content in the cement mortar, improve the compactness of the cement mortar lining, be favorable for reducing the volume shrinkage of the cement mortar lining and reduce the generation of cracks of the cement mortar lining.
The silane impregnating solution or the organosilicon emulsion is sprayed on the surface of the cement mortar lining, so that the peeling caused by rain erosion of the lining in the outdoor storage process can be reduced, and the weather resistance of the cement mortar lining is improved. The silane impregnating solution or the organosilicon emulsion can prevent or reduce the expansion of the dissolved matters caused by the rainwater immersed into the cement mortar lining by forming a waterproof layer on the surface of the lining, so that the peeling defect of the cement mortar lining is reduced. The selection principle of the silane impregnating solution or the organosilicon emulsion is as follows: the cement mortar has no influence on various performances of the cement mortar and no toxicity to people.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. The invention provides cement mortar for a spheroidal graphite cast iron pipe lining, a preparation method of the cement mortar and a manufacturing method of the lining, wherein the preparation method comprises the following steps:
example 1:
the mortar lining material comprises the following components in parts by mass: 100 parts of ordinary Portland cement, 0.1 part of polycarboxylate water reducer, 1 part of penetrating crystallization agent, 190 parts of sand and 35 parts of water.
The preparation method of the spheroidal graphite cast tube mortar lining comprises the following steps:
a: sequentially adding sand, ordinary Portland cement, a polycarboxylic acid water reducer and a penetrating crystallizing agent into a mortar stirrer, fully stirring the dry materials for 2min, and then adding water and stirring for 10min to obtain lining mortar;
b: uniformly distributing the lining mortar into a DN600 ductile iron pipe, and centrifugally lining to enable the lining mortar to be attached to the inner wall of the ductile iron base material under the action of centrifugal force, wherein the centrifugal parameters are shown in the following table:
table 2 example 1 centrifuge lining parameters
| Low speed stage | Medium speed stage | High speed stage | |
| Pipe rotational speed/rpm | 77 | 386 | 457 |
| Centripetal force/g | 2 | 50 | 70 |
| Duration/s | 20 | 30 | 30 |
C: naturally curing the centrifuged cement mortar lining for 6 hours at 20 ℃, then steam curing for 3 hours at 50 ℃ and steam curing for 2 hours at 70 ℃. After curing, polishing to obtain a common silicate cement mortar lining with the thickness of 5 mm; after the subsequent procedures, the product can be normally put in storage or sent out.
Example 2:
the mortar lining material comprises the following components in parts by mass: 100 parts of ordinary Portland cement, 0.1 part of polycarboxylate water reducer, 1 part of penetrating crystallization agent, 220 parts of sand and 35 parts of water. After polishing the lining, spraying silane impregnating solution or organosilicon emulsion 500g/m 2 。
The preparation method of the spheroidal graphite cast tube mortar lining comprises the following steps:
a: sequentially adding sand, ordinary Portland cement, a polycarboxylic acid water reducer and a penetrating crystallizing agent into a mortar stirrer, fully stirring the dry materials for 2min, and then adding water and stirring for 10min to obtain lining mortar;
b: uniformly distributing the lining mortar into a DN1000 nodular cast iron pipe, and centrifugally lining to enable the lining mortar to be attached to the inner wall of the ductile iron base material under the action of centrifugal force, wherein the centrifugal parameters are shown in the following table:
TABLE 3 example 2 centrifuge lining parameters
| Low speed stage | Medium speed stage | High speed stage | |
| Pipe rotational speed/rpm | 60 | 300 | 355 |
| Centripetal force/g | 2 | 50 | 70 |
| Duration/s | 20 | 30 | 30 |
C: naturally curing the centrifuged cement mortar lining for 6 hours at 20 ℃, then steam curing for 3 hours at 50 ℃ and steam curing for 2 hours at 70 ℃. After curing, polishing to obtain a common silicate cement mortar lining with the thickness of 6 mm;
d: spraying silane impregnating solution or organic silicon emulsion on the polished surface of the cement mortar lining, wherein the spraying amount is 500g/m 2 The silane impregnating solution or the organosilicon emulsion is enabled to fully wet the cement mortar lining. After the surface of the cement mortar lining is dried, the cement mortar lining can be normally put in storage or sent out after the subsequent process.
Example 3:
the mortar lining material comprises the following components in parts by mass: 100 parts of aluminate cement, 230 parts of sand,45 parts of water. After polishing the lining, spraying silane impregnating solution or organosilicon emulsion 500g/m 2 。
The preparation method of the spheroidal graphite cast tube mortar lining comprises the following steps:
a: sequentially adding sand, aluminate cement and water into a mortar stirrer, and stirring for 15min to obtain lining mortar;
b: uniformly distributing the lining mortar into the DN1400 nodular cast iron pipe, and centrifugally lining to enable the lining mortar to be attached to the inner wall of the ductile iron base material under the action of centrifugal force, wherein the centrifugal parameters are shown in the following table:
TABLE 4 example 3 centrifuge lining parameters
C: naturally curing the centrifuged cement mortar lining for 6 hours at 20 ℃, then steam curing for 3 hours at 50 ℃ and steam curing for 2 hours at 80 ℃. After curing, polishing to obtain an aluminate cement mortar lining with the thickness of 9 mm;
d: spraying silane impregnating solution or organic silicon emulsion on the polished surface of the cement mortar lining, wherein the spraying amount is 500g/m 2 The silane impregnating solution or the organosilicon emulsion is enabled to fully wet the cement mortar lining. After the surface of the cement mortar lining is dried, the cement mortar lining can be normally put in storage or sent out after the subsequent process.
Example 4:
the mortar lining material comprises the following components in parts by mass: 100 parts of aluminate cement, 1 part of penetrating crystallization agent, 230 parts of sand and 45 parts of water. After polishing the lining, spraying silane impregnating solution or organosilicon emulsion 500g/m 2 。
The preparation method of the spheroidal graphite cast tube mortar lining comprises the following steps:
a: sequentially adding sand, aluminate cement and a penetrating crystallizing agent into a mortar stirrer, fully stirring the dry materials for 2min, and then adding water and stirring for 10min to obtain lining mortar;
b: uniformly distributing the lining mortar into the DN1400 nodular cast iron pipe, and centrifugally lining to enable the lining mortar to be attached to the inner wall of the ductile iron base material under the action of centrifugal force, wherein the centrifugal parameters are shown in the following table:
TABLE 5 example 4 centrifuge lining parameters
| Low speed stage | Medium speed stage | High speed stage | |
| Pipe rotational speed/rpm | 72 | 160 | 196 |
| Centripetal force/g | 4 | 20 | 30 |
| Duration/s | 60 | 80 | 80 |
C: naturally curing the centrifuged cement mortar lining for 6 hours at 20 ℃, then steam curing for 3 hours at 50 ℃ and steam curing for 2 hours at 80 ℃. After curing, polishing to obtain an aluminate cement mortar lining with the thickness of 9 mm;
d: spraying silane impregnating solution or organic silicon emulsion on the polished surface of the cement mortar lining, wherein the spraying amount is 500g/m 2 The silane impregnating solution or the organosilicon emulsion is enabled to fully wet the cement mortar lining. After the surface of the cement mortar lining is dried, the cement mortar lining can be normally put in storage or sent out after the subsequent process.
Comparative example 1:
the water reducer and the penetrating crystallization agent added in the example 1 are removed, and the other components are used in the same amount and the preparation method as in the example 1, so that the ordinary silicate cement mortar lining with the thickness of 5mm is obtained.
Comparative example 2:
the procedure for removing the spray silane impregnating solution or the organosilicon emulsion in example 3 was the same as in example 3 with other components and preparation methods to obtain an aluminate cement mortar liner with a thickness of 9 mm.
Test 1:
lining cracking test: 100 branch pipes are selected for each cement mortar lining, the cracking proportion (crack width 0.06-0.1 mm) of different linings at different ages is counted, and the statistical results are shown in the following table:
TABLE 6 liner cracking ratio
As can be seen from the data in Table 6, the cracking ratios of the cement mortar linings of the examples 1, 2, 3 and 4 prepared by the method are lower than those of the cement mortar linings of the comparative examples 1 and 2, and the cracking ratios of the examples 1, 2 and 4 added with the penetrating crystallization agent are obviously reduced.
Test 2:
lining skinning test: taking aluminate cement mortar linings as test objects, selecting 100 branch pipes for each lining, and placing the lining at outdoor non-shielding positions, wherein the lining is subjected to a plurality of times of rainwater weather. And (3) counting the skinning proportion of different liners at different ages, wherein the counting result is shown in the following table:
TABLE 7 liner skinning ratio
Remarks: the 7d age did not experience rain weather, the 28d age experienced 2 rain weather, and the 90d age experienced 9 rain weather.
As can be seen from the data in Table 7, the proportions of the cement mortar lining of example 3 and example 4 prepared by the present invention are lower than those of comparative example 2 at different ages.
Test 3:
liner porosity test: under different ages, taking different cement mortar inner lining blocks, taking 10 blocks of each lining block, immersing the inner lining blocks in ethanol to terminate hydration, thoroughly drying the inner lining blocks, and detecting the porosity of the cement mortar inner lining to obtain the average porosity of each lining. The detection results are shown in the following table:
table 8 porosity of different liners at different ages
From the data in Table 8, it can be seen that the porosity of the cement mortar liners of examples 1, 2 and 4 prepared by the present invention with the addition of the penetrating crystallization agent is lower than that of the cement mortar liners of comparative examples 1 and 2 at different ages.
The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (8)
1. The cement mortar for the spheroidal graphite cast iron pipe lining is characterized by comprising the following components in parts by weight: sand: penetrating crystallization agent: water reducing agent: water = 100 (100-250): (1-2): (0.1-0.2): (35-45).
2. The cement mortar for the lining of the nodular cast iron pipe, as claimed in claim 1, is characterized by comprising the following components in parts by weight: sand: penetrating crystallization agent: water reducing agent: water = 100:190:1:0.1:35.
3. the anticorrosive mortar for the cement mortar lining of the nodular cast iron pipe, as claimed in claim 1, is characterized by comprising the following components in parts by weight: sand: penetrating crystallization agent: water reducing agent: water = 100:220:1:0.1:35.
4. the cement mortar for lining a ductile iron pipe according to claim 1 wherein the cement is high aluminum cement and the water reducing agent is a naphthalene water reducing agent or a polycarboxylic acid water reducing agent.
5. The ductile iron pipe lining cement mortar according to claim 1 wherein the cement is portland cement and the water reducer is a polycarboxylate water reducer.
6. A method of preparing the ductile iron pipe lining cement mortar of any one of claims 1-5, comprising:
sequentially adding sand, ordinary silicate cement, a polycarboxylic acid water reducer and a penetrating crystallizing agent into a mortar stirrer in parts by weight, fully stirring, and then adding water and stirring in parts by weight to obtain lining mortar.
7. The manufacturing method of the cement mortar lining of the ductile cast iron pipe is characterized by comprising the following steps of:
a: uniformly distributing the lining mortar of claim 6 into the nodular cast iron pipe, and centrifugally lining to enable the lining mortar to be attached to the inner wall of the ductile iron base material under the action of centrifugal force;
b: naturally curing the centrifuged cement mortar lining for 5-6 hours at 20 ℃, then steam curing for 2-3 hours at 50-70 ℃, steam curing for 2-3 hours at 70-90 ℃, and polishing after curing to obtain the cement mortar lining.
8. The method for manufacturing a cement mortar liner for a ductile iron pipe according to claim 7 further comprising:
and spraying silane impregnating solution or organic silicon emulsion on the surface of the polished cement mortar lining to fully wet the cement mortar lining by the silane impregnating solution or organic silicon emulsion.
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| CN202310535693.3A CN116535166A (en) | 2023-05-12 | 2023-05-12 | Cement mortar for spheroidal graphite cast iron pipe lining, preparation method of mortar and manufacturing method of lining |
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| CN202310535693.3A CN116535166A (en) | 2023-05-12 | 2023-05-12 | Cement mortar for spheroidal graphite cast iron pipe lining, preparation method of mortar and manufacturing method of lining |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108995028A (en) * | 2018-08-31 | 2018-12-14 | 山西永益铸管股份有限公司 | A kind of preparation method of the ductile iron pipe of high-strength corrosion-resisting |
| CN111848070A (en) * | 2020-08-10 | 2020-10-30 | 郑州登峰熔料有限公司 | Aluminate cement mortar for cast iron pipe lining and preparation method thereof |
| CN115893960A (en) * | 2022-11-03 | 2023-04-04 | 新兴铸管股份有限公司 | Mortar lining material, nodular cast iron pipe lining for sewage and manufacturing method of mortar lining material and nodular cast iron pipe lining |
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- 2023-05-12 CN CN202310535693.3A patent/CN116535166A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108995028A (en) * | 2018-08-31 | 2018-12-14 | 山西永益铸管股份有限公司 | A kind of preparation method of the ductile iron pipe of high-strength corrosion-resisting |
| CN111848070A (en) * | 2020-08-10 | 2020-10-30 | 郑州登峰熔料有限公司 | Aluminate cement mortar for cast iron pipe lining and preparation method thereof |
| CN115893960A (en) * | 2022-11-03 | 2023-04-04 | 新兴铸管股份有限公司 | Mortar lining material, nodular cast iron pipe lining for sewage and manufacturing method of mortar lining material and nodular cast iron pipe lining |
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