Road concrete prepared from waterworks sludge powder and coral fine aggregate
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A technology of waterworks and sludge powder, which is applied in the field of building materials, can solve the problems of land secondary pollution, etc., and achieve the effect of improving early strength, improving activity, and improving interface transition zone
Inactive Publication Date: 2021-03-02
SHAOXING MUNICIPAL DESIGN INST +1
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Problems solved by technology
Cities are often discarded and randomly piled up with sludge that has not undergone harmless treatment, causing secondary pollution of the land
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Embodiment 1
[0039] Concrete for highways prepared from waterworks sludge powder and coral fine aggregate, calculated by weight components, includes the following components,
[0040] 370 parts of cement with P O 52.5, 36 parts of sludge powder from waterworks, 590 parts of river sand, 38 parts of coral fine aggregate, 1170 parts of crushed stone, 4 parts of quicklime powder, 1 part of gypsum powder, 183 parts of water, water reduction 5 parts of agent, water-binder ratio 0.45.
[0041] The technical index of the road concrete prepared by using the sludge powder from the waterworks in this embodiment: the 28d bending tensile strength is 4.3MPa.
Embodiment 2
[0043] Concrete for highways prepared from waterworks sludge powder and coral fine aggregate, calculated by weight components, includes the following components,
[0044] 390 parts of cement with P O 52.5, 38 parts of sludge powder from waterworks, 585 parts of river sand, 37 parts of coral fine aggregate, 1150 parts of crushed stone, 8 parts of quicklime powder, 2 parts of gypsum powder, 180 parts of water, water reduction 6 parts of agent, water-binder ratio 0.42.
[0045] The technical index of the road concrete prepared by adopting the sludge powder from the waterworks in this embodiment: the 28d bending tensile strength is 4.6MPa.
Embodiment 3
[0047] Concrete for highways prepared from waterworks sludge powder and coral fine aggregate, calculated by weight components, includes the following components,
[0048] 410 parts of cement with P O 52.5, 41 parts of sludge powder from waterworks, 570 parts of river sand, 46 parts of coral fine aggregate, 1135 parts of crushed stone, 12 parts of quicklime powder, 3 parts of gypsum powder, 176 parts of water, water reduction 7 parts of agent, water-binder ratio 0.39.
[0049] The technical index of the road concrete prepared by adopting the sludge powder from the waterworks in this embodiment: the 28d bending tensile strength is 4.9MPa.
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Abstract
The invention discloses road concrete prepared from waterworks sludge powder and coral fine aggregate. The road concrete comprises the following components in parts by weight: 370-430 parts of cement,36-43 parts of waterworks sludge powder, 570-590 parts of river sand, 36-46 parts of coral fine aggregate, 1120-1170 parts of broken stone, 4-16 parts of quicklime powder, 1-4 parts of gypsum powder,166-183 parts of water and 5-9 parts of water reducing agent, wherein the water-binder ratio is 0.35-0.45. According to the invention, waterworks sludge powder is used as a mineral admixture to replace part of cement, and quicklime powder and gypsum powder are doped to further stimulate and improve the activity of the waterworks sludge powder; and coral fine aggregate is used for replacing part of river sand, aggregate grain composition and the 'micro-pump' effect of the coral aggregate are further improved, the local water-binder ratio of the aggregate surface can be adjusted, and the performance of concrete for roads is improved. The concrete for the road is prepared from the perspective of optimal design of cementing materials and aggregates, so that the performance of the concrete isimproved, the high-added-value green application of sludge powder and coral fine aggregates of waterworks is facilitated, and the comprehensive benefit is high.
Description
technical field [0001] The invention relates to the technical field of building materials, in particular to road concrete prepared from waterworks sludge powder and coral fine aggregate. Background technique [0002] Since the advent of concrete, it has greatly accelerated the development of national infrastructure projects, especially the development of road construction. The design strength of concrete for highways generally adopts the 28-day bending and tensile strength of cement concrete. Compared with ordinary concrete that uses the 28-day cubic compressive strength as the design strength, its strength requirements are higher, and the design bending and tensile strength of the traffic load class is light. 4.0MPa, medium grade is 4.5MPa, heavy, extra heavy and extremely heavy grade is above 5.0MPa. With the increasing scale of my country's infrastructure, traditional raw materials such as cement and natural aggregates can no longer meet the construction needs. Therefore...
Claims
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