Unlock instant, AI-driven research and patent intelligence for your innovation.

Compound admixture for steam-pressure maintaining production of concrete steel pipe pile and manufacturing method thereof

A technology of composite admixture and concrete steel pipe, which is applied in the field of concrete admixture production to achieve the effect of improving structural bearing capacity, reducing cement consumption, and improving compressive strength

Inactive Publication Date: 2011-09-07
嘉兴学院管桩应用技术研究所
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, light-burned magnesia and high-silica sand are compounded in a certain proportion and then ground to a certain fineness to make a new type of concrete composite admixture, which is specially used for autoclaved curing to produce concrete steel pipe piles. There is no report

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Embodiment 1. Lightly burned magnesia and high silica sand are compounded and prepared in a ratio of 4% by weight: 96%, and they are ground together to a specific surface area of ​​420m 2 / kg; among them, SiO in high silica sand 2 The content of MgO in light-burned magnesia is 92%, and the content of MgO in light-burned magnesia is 91%. The amount of grinding aid added during grinding is 0.05% of the total amount of admixture. Use this composite admixture to replace 30% of ordinary Portland cement in equal amounts. After normal pressure steam curing (total time 7 hours, constant temperature 85°C), the concrete strength is 52MPa, and then through autoclaved curing (total time 10°C). Hours, constant temperature temperature 185 ℃, constant temperature pressure 1.0MPa), concrete strength is 96MPa, and the self-stress test value of the pile body concrete reaches 0.4MPa, which effectively guarantees the joint action of steel pipes and concrete.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
strengthaaaaaaaaaa
strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a compound admixture for steam-pressure maintaining production of a concrete steel pipe pile and a manufacturing method thereof. Light calcined magnesium oxide and high-silica sand are compounded in a certain proportion and then milled to the compound admixture with a specific surface area no less than 380m<2> / kg. The compound admixture can replace partial cement so as toimprove the compression strength of the concrete; and simultaneously, chemical prestress is established between a steel pipe and the concrete, so that a steel pipe-centrifugal concrete compound structure can give a full play to the mechanical properties of two types of materials, thereby improving the bearing capability of the structure.

Description

technical field [0001] The invention relates to a method for preparing a concrete admixture. Background technique [0002] In the prior art, the cementitious material used in the production of prefabricated high-strength concrete thin-walled steel pipe piles (abbreviation: concrete steel pipe piles) is high-grade Portland cement or ordinary Portland cement above grade 42.5, and the patent application publication number is CN 101003152A " In "Chemical prestressing technology method of steamed high-strength concrete thin-walled steel pipe pile", it is proposed to add 5% to 35% light-burned magnesium oxide in concrete mixing; patent application publication number CN 1411968 "Chemical prestressing technology method of steel pipe centrifugal concrete products "It is proposed to use self-stressing cement and expansive cement in concrete preparation, or add various types of concrete expansion agents to Portland cement, ordinary Portland cement, and slag Portland cement. However, l...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/10
CPCC04B28/02C04B20/026
Inventor 蒋元海
Owner 嘉兴学院管桩应用技术研究所