Bentonite modified aluminate inorganic anticorrosive mortar for pipe network repair and preparation method thereof

Abstract

The invention discloses bentonite modified aluminate inorganic anticorrosive mortar for pipe network repair and a preparation method thereof. The preparation method comprises the following steps of preparing dry powder: mixing 100-120 parts by mass of Portland cement, 20-30 parts by mass of high-resistance aluminate cement, 60-80 parts by mass of quartz sand, 40-50 parts by mass of river sand, 1-5 parts by mass of a water reducing agent,1-3 parts by mass of steel fiber, and1-3 parts by mass ofpolyanionic cellulose, and uniformly stirring, continuously stirring the obtained dry powder, and adding 50-60 parts of water while stirring, adding 2-5 parts of self-made bentonite slurry, and stirring for 5-10 minutes at the speed of 200-400 r / min to form a mortar product. The self-made bentonite slurry is prepared by uniformly mixing 8-10 parts of high-viscosity bentonite, 0.2-0.5 part of sodium carbonate and 95-100 parts of water in proportion, stirring and puffing; the high-viscosity bentonite is high-viscosity organic bentonite prepared by modifying organic quaternary ammonium salt. By setting the components, the prepared mortar is higher in water-retaining property, thixotropy and adhesive capacity, shorter in setting time, higher in flexural and compressive strength and higher in corrosion resistance.

Description

technical field

[0001] The invention relates to the field of pipeline repair, in particular to a bentonite-modified aluminate inorganic anti-corrosion mortar for pipeline network repair and a preparation method thereof. Background technique

[0002] With the further advancement of national urbanization, the design of urban underground foundations is intricate, which puts forward higher requirements for underground pipe network systems. In particular, some underground drainage pipe networks constructed in the early stage have collapsed and damaged to varying degrees, and conventional excavation repairs have a certain impact on the urban traffic environment and other aspects. More and more trenchless repairs are being used in the repair of drainage pipe networks. under construction. Trenchless pipeline repair technology can well solve the problems of aging, corrosion, leakage, interface disconnection, deformation and other problems in urban pipelines, prolong the service life...

Examples

Embodiment 1

[0023] Preparation of dry powder: in parts by mass, 100 parts of P.O.42.5 Portland cement, 20 parts of high-resistance aluminate cement, 60 parts of quartz sand (70 mesh), 40 parts of river sand, early-strength polycarboxylate 1 part of acid superplasticizer powder, 1 part of steel fiber, and 1 part of polyanionic cellulose were uniformly mixed (stirring at 500 r / min for 10 minutes) to prepare dry powder.

[0024] Then add 50 parts of water while stirring, and stir at 300r / min for 10 minutes to prepare mortar; then add 2 parts of homemade bentonite, and stir at 300r / min for 30 minutes to form an anti-corrosion mortar product.

Embodiment 2

[0026] Preparation of dry powder: in parts by mass, 120 parts of P.O.42.5 Portland cement, 30 parts of high-resistance aluminate cement, 80 parts of quartz sand (80 mesh), 50 parts of river sand, early-strength polycarboxylate 5 parts of acid superplasticizer powder, 3 parts of steel fiber, and 3 parts of polyanionic cellulose were uniformly mixed (stirring at 500 r / min for 10 minutes) to prepare dry powder; the quartz sand was 70 mesh.

[0027] Then add 60 parts of water while stirring, and stir at 300r / min for 10 minutes to prepare mortar; then add 5 parts of homemade bentonite, and stir at 300r / min for 10 minutes to form an anti-corrosion mortar product.

Embodiment 3

[0029] Preparation of dry powder: In parts by mass, 110 parts of P.O.42.5 Portland cement, 25 parts of high-resistance aluminate cement, 70 parts of quartz sand (100 mesh), 45 parts of river sand, early-strength polycarboxylate 3 parts of acid superplasticizer powder, 2 parts of steel fiber, and 2 parts of polyanionic cellulose were uniformly mixed (stirring at 500 r / min for 10 minutes) to prepare dry powder; the quartz sand was 70 mesh.

[0030] Then add 60 parts of water while stirring, and stir at 300r / min for 10 minutes to prepare mortar; then add 4 parts of homemade bentonite, and stir at 300r / min for 10 minutes to form an anti-corrosion mortar product.

technical field

[0001] The invention relates to the field of pipeline repair, in particular to a bentonite-modified aluminate inorganic anti-corrosion mortar for pipeline network repair and a preparation method thereof. Background technique

[0002] With the further advancement of national urbanization, the design of urban underground foundations is intricate, which puts forward higher requirements for underground pipe network systems. In particular, some underground drainage pipe networks constructed in the early stage have collapsed and damaged to varying degrees, and conventional excavation repairs have a certain impact on the urban traffic environment and other aspects. More and more trenchless repairs are being used in the repair of drainage pipe networks. under construction. Trenchless pipeline repair technology can well solve the problems of aging, corrosion, leakage, interface disconnection, deformation and other problems in urban pipelines, prolong the service life...

Examples

Embodiment 1

[0023] Preparation of dry powder: in parts by mass, 100 parts of P.O.42.5 Portland cement, 20 parts of high-resistance aluminate cement, 60 parts of quartz sand (70 mesh), 40 parts of river sand, early-strength polycarboxylate 1 part of acid superplasticizer powder, 1 part of steel fiber, and 1 part of polyanionic cellulose were uniformly mixed (stirring at 500 r / min for 10 minutes) to prepare dry powder.

[0024] Then add 50 parts of water while stirring, and stir at 300r / min for 10 minutes to prepare mortar; then add 2 parts of homemade bentonite, and stir at 300r / min for 30 minutes to form an anti-corrosion mortar product.

Embodiment 2

[0026] Preparation of dry powder: in parts by mass, 120 parts of P.O.42.5 Portland cement, 30 parts of high-resistance aluminate cement, 80 parts of quartz sand (80 mesh), 50 parts of river sand, early-strength polycarboxylate 5 parts of acid superplasticizer powder, 3 parts of steel fiber, and 3 parts of polyanionic cellulose were uniformly mixed (stirring at 500 r / min for 10 minutes) to prepare dry powder; the quartz sand was 70 mesh.

[0027] Then add 60 parts of water while stirring, and stir at 300r / min for 10 minutes to prepare mortar; then add 5 parts of homemade bentonite, and stir at 300r / min for 10 minutes to form an anti-corrosion mortar product.

Embodiment 3

[0029] Preparation of dry powder: In parts by mass, 110 parts of P.O.42.5 Portland cement, 25 parts of high-resistance aluminate cement, 70 parts of quartz sand (100 mesh), 45 parts of river sand, early-strength polycarboxylate 3 parts of acid superplasticizer powder, 2 parts of steel fiber, and 2 parts of polyanionic cellulose were uniformly mixed (stirring at 500 r / min for 10 minutes) to prepare dry powder; the quartz sand was 70 mesh.

[0030] Then add 60 parts of water while stirring, and stir at 300r / min for 10 minutes to prepare mortar; then add 4 parts of homemade bentonite, and stir at 300r / min for 10 minutes to form an anti-corrosion mortar product.

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