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Seawater-sea sand concrete

A technology for concrete and sea sand, applied in the field of building materials, can solve problems such as being unable to be used for preparation, and achieve the effects of low cost, promotion of ecological environment protection, and improvement of work performance

Active Publication Date: 2016-05-04
CHINA BUILDING MATERIALS ACAD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem solved by the invention is to significantly improve the working stability of seawater and sea sand plain concrete, so that seawater and sea sand that cannot be used to prepare concrete can be used on site, and concrete with performance not lower than that of freshwater river sand can be prepared

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This embodiment provides a kind of seawater sea sand concrete, and its raw material components are respectively by mass parts: cement 12.5kg, seawater 6.5kg, sea sand 32.5kg, stone 43kg, fly ash 4.5kg, water reducer 0.4kg, Air-entraining agent 0.002kg, retarder 0.01kg, sacrificial agent 0.005kg.

[0028] After accurately weighing the above-mentioned raw materials, put them into a twin-shaft forced mixer and mix them evenly for 2 minutes, then conduct a fresh mixing performance test, and shape them into 150*150*150mm 3 The cube specimens are used for strength testing. The test results are shown in Table 1:

[0029] The concrete physical property of table 1 embodiment 1

[0030]

[0031] The test results show that the slump of the concrete reaches 130mm, the construction performance is good, the initial and final setting times are reasonable, and the construction is not affected, the early strength increases rapidly, and the 28d strength meets the requirements of C50...

Embodiment 2

[0038] This embodiment provides a kind of seawater sea sand concrete, its raw material components are measured by mass parts: cement 15kg, seawater 7kg, sea sand 33kg, stone 42.4kg, fly ash 1.5kg, slag powder 4kg, water reducing agent 0.6kg, Air-entraining agent 0.02kg, retarder 0.01kg, including sacrificial agent; 5 batches of experiments were carried out, the difference is that the amount of sacrificial agent added is different, respectively 0.003kg, 0.004, 0.005kg, 0.006kg, 0.007kg. Before mixing the above raw materials, accurately weigh the sacrificial agent, add the sacrificial agent and mix for 2 minutes, then select different regions, seawater and sea sand for experiments to test the fresh performance and early performance of different batches of concrete, and measure the results as shown in Table 3. Among them, the first batch to the fifth batch correspond to seawater and sea sand concrete with sacrificial agent addition amounts of 0.003kg, 0.004, 0.005kg, 0.006kg, and...

Embodiment 3

[0045] This embodiment provides a kind of seawater sea sand concrete, its raw material components in parts by mass: 21kg of cement, 8kg of seawater, 36kg of sea sand, 42kg of stone, 4kg of fly ash, 3kg of slag powder, 0.8kg of water reducing agent, air-entrained Agent 0.04kg, retarder 0.01%, sacrificial agent 0.006kg. After accurately weighing the above-mentioned raw materials, put them into a twin-shaft forced mixer and mix them evenly for 2 minutes, then conduct a fresh mixing performance test, and shape them into 150*150*150mm 3 The cube specimens are used for strength testing. The test results are shown in Table 4:

[0046] The concrete physical property of table 4 embodiment 3

[0047]

[0048] The test results show that the antifreeze performance of concrete (mass loss rate after 300 times of freezing and thawing is 2.2%, and relative dynamic modulus of elasticity is 94%) meets the requirements of national standards after appropriately increasing the amount of induc...

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Abstract

The invention discloses a seawater-sea sand concrete, belonging to the field of building materials. The seawater-sea sand concrete comprises the following components in parts by mass: 10-25 parts of cement, 4-9 parts of seawater, 25-40 parts of sea sand, 35-55 parts of stone, 0.1-0.8 part of water reducing agent, 0.005-0.02 part of retarder, 0.01-0.05 part of air entraining agent and 0.001-0.01 part of sacrifice agent. The seawater-sea sand concrete solves the technical problem that the seawater and sea sand can not be directly utilized easily. The seawater-sea sand concrete disclosed by the invention has excellent working performance, different production batches have stable working performance, and thus, the seawater-sea sand concrete is suitable for large-scale continuous production and low in cost.

Description

technical field [0001] The invention relates to seawater and sea sand concrete, in particular to a technology for making concrete materials and products by using seawater and sea sand, and belongs to the field of building materials. Background technique [0002] In the report of the 18th National Congress of the Communist Party of China, the strategy of "improving the development of marine resources, resolutely safeguarding the country's maritime rights and interests, and building a maritime power" was put forward. The development of the ocean is a major demand for economic construction, social development, national security, and promotion of energy structure adjustment and scientific and technological development. [0003] my country's ocean area is 3 million square kilometers, the total number of islands is more than 5,000, and the total length of coastline is 32,000 kilometers, including 18,000 kilometers of mainland coastline and 14,000 kilometers of island coastline. For...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B111/20
CPCC04B28/04C04B2111/20C04B22/0026C04B14/068C04B14/02C04B14/46C04B18/08C04B18/067C04B14/30C04B18/142C04B18/146C04B18/12C04B18/24C04B2103/302C04B2103/22C04B2103/304C04B2103/404C04B2103/406C04B24/24C04B24/16C04B24/18C04B24/06C04B24/00C04B24/02C04B24/34C04B24/10C04B24/32C04B24/122
Inventor 姚燕王振地王玲吴浩张萍杨何忠
Owner CHINA BUILDING MATERIALS ACAD
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