Oyster attachment substrate made of lightweight concrete and preparation method thereof
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A light-weight concrete and attachment-based technology, which is applied to the intersection of marine sessile organisms and marine concrete, can solve the problems of increased seawater alkalinity, dark gray of cement attachment base, and no consideration of water consumption, so as to reduce labor costs. , the effect of reducing weight
Active Publication Date: 2020-06-12
HARBIN ENG UNIV
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[0024] The purpose of the present invention is to solve the problem of the release of a large amount of alkali contained in the attachment base due to the lack of consideration of the control of water consumption and maintenance (the water-cement ratio and the curing determine the permeability of concrete), so that the seawater alkali in contact with it The increase of the concentration can inhibit the attachment of marine sessile organism larvae. At the same time, due to the large amount of shell powder mixed in, the color of the cement attachment base will change from dark gray to light, which is not conducive to the problem of oyster attachment. Provide a method that can induce sessile organisms quickly , a lightweight concrete attachment base that is densely attached to the concrete surface and has good durability
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Embodiment 1
[0049] Example 1: Ordinary Portland cement concrete mix ratio, ordinary Portland cement, lightweight coarse aggregate, lightweight fine aggregate, water and polycarboxylate superplasticizer powder weight proportions are: 29.37%, 33.53% %, 24.48%, 12.59%, 0.03%.
[0050] The lightweight coarse aggregate described herein is one or both of light porous basalt and light ceramsite with a maximum particle size less than 20 mm. The lightweight fine aggregate is one or both of crushed zeolite and lightweight ceramic sand, with a particle size of 0.2 mm to 5 mm and good gradation. The water should meet the concrete water standard (JGJ63-2006), Cl- content 4.5, and have little effect on the initial setting time difference and final setting time, strength and permeability of cement. And the above materials selected in Examples 1-15 are the same.
Embodiment 2
[0051] Example 2: Baseline concrete mix ratio, the weight ratio of ordinary Portland cement, silica fume, blast furnace slag powder, lightweight coarse aggregate, lightweight fine aggregate, water and polycarboxylate superplasticizer powder is: 17.62 %, 1.47%, 10.28%, 33.53%, 24.48%, 12.59%, 0.03%.
Embodiment 3
[0052] Embodiment 3: The weight ratio of unmodified dark pigment, ordinary Portland cement, silica fume, blast furnace slag powder, lightweight coarse aggregate, lightweight fine aggregate, water and polycarboxylate water reducer powder is as follows: : 1.47%, 17.62%, 1.29%, 8.99%, 33.53%, 24.48%, 12.59%, 0.03%.
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Abstract
The invention relates to an oyster attachment substrate technology, in particular to an oyster attachment substrate made of lightweight concrete and a preparation method thereof, and belongs to the crossing field of marine sessile organisms and marine concrete. The attachment substrate comprises the following components: a cementing material, a light coarse aggregate, a light fine aggregate, water, dark pigment, calcium carbonate powder, trace elements and a superplasticizer. By adopting the lightweight aggregate concrete, the weight of a concrete attachment substrate can be reduced, and the cost of transportation, labor and the like can be reduced in the preparation, transportation and maintenance processes of a test piece; the labor cost for fishermen to move the attachment substrate andharvest oysters or the cost for transporting, fixing and the like in ocean concrete engineering can be reduced during actual sea culture; and the risk of accidental falling onto the ground to be broken during use can be reduced.
Description
technical field [0001] The invention relates to an oyster attachment base technology, in particular to an oyster attachment base for lightweight concrete and a preparation method thereof, and belongs to the intersection field of marine sessile organisms and marine concrete. Background technique [0002] With the improvement of people's living standards, oysters, as a healthy delicacy on the table, have an increasing demand for consumption. Traditional small farming scales and farming methods can no longer meet the growing demand for oysters. At the same time, with the increase in the restoration of oyster reefs and the upcoming construction of marine ecological engineering for oyster-like reefs, the demand for oyster attachment substrates is increasing. Common culture methods include bamboo planting culture, bottom sowing culture, strip stone and standing stone culture, hanging culture, etc., but the problem is that it takes a long time for oysters to achieve a satisfactory...
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