CN104743998A - Method for wet-type burning sea sand to produce high strength building material - Google Patents
Method for wet-type burning sea sand to produce high strength building material Download PDFInfo
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- CN104743998A CN104743998A CN201510100658.4A CN201510100658A CN104743998A CN 104743998 A CN104743998 A CN 104743998A CN 201510100658 A CN201510100658 A CN 201510100658A CN 104743998 A CN104743998 A CN 104743998A
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Abstract
The invention relates to a method for wet-type burning sea sand to produce a high strength building material. The method comprises the following steps: weighing sea sand and slaked lime at a weight ratio of 60-90%: 10-40%, stirring and mixing uniformly, adding sea water, mixing, and performing compression moulding to obtain the building material proximate matter green body; demoulding the green body and performing wet type burning to obtain the building material proximate matter product. Through detection, the breaking strength is 20-24MPa, the adding amount of sea water is 5-20% of sea sand and slaked lime; sea sand is a dinas which is directly exploited on the sea land and corroded by the sea water without being desalted; the wet-type burning process comprises the steps of putting the green body in a hydrothermal reactor, and performing hydrothermal solidification for 9-24h at the temperature of 120-240 DEG C. The local material sea sand in the coastal city and the island with rich reserves and low utilization rate is solidified to form a wall brick, a floor tile, a square brick, an artificial fish reef and an ocean river reinforcing dam; the island building cost and time are greatly saved and the method is particularly suitable for the development and construction of a remote island (such as Nansha islands).
Description
Technical field
The present invention relates to and a kind of extra large sand wet type is fired the method becoming high-intensity building materials, belong to and utilize natural resources to prepare building material technical field.
Background technology
In order to safeguard maritime rights and interests, as traditional land big country, country increases Islands Exploitation dynamics, strides forward to ocean, builds island.A large amount of material of construction is needed in the process of construction of island.At present, build the material of construction on island and depend on overland transportation, so not only can at substantial manpower, material resources and financial resources, also make building time greatly extend simultaneously, to the construction on island and exploitation very unfavorable.And extra large sand is as the second largest marine minerals being only second to oil and gas, current utilization ratio is lower.If extra large sand can be gathered materials on the spot become material of construction, just can save the cost and time of building island widely, extra large sand also can be fully utilized simultaneously, and the development for building material market provides new thinking.
Rough Statistics, sea, China shallow sea sand reserves are about 1.6 trillion tons, and Utilization prospects is very wide.Current China sea sand is mainly used in the large-scale construction such as sea reclamation.In the application of material of construction, because it contains relatively high salinity, in salinity, chlorion meeting corroded steel reinforcement, brings potential safety hazard to engineering, because which limit the application of extra large sand.In August, 2004, Minstry of Housing and Urban-Rural Development of People Republic of China (MOHURD) has put into effect " suggestion about strict extra large sandpipe reason for building ", wherein specify: the extra large sand adopted in construction work must be through special desalination process, if will be used in Steel Concrete, the chloride ion content of extra large sand should not be greater than 6/10000ths.
Summary of the invention
The object of this invention is to provide and a kind of extra large sand wet type is fired the method becoming high-intensity building materials, it is exactly hydrothermal hardening that described wet type is fired.Specifically rich reserves around coastal cities and island but the low extra large sand of utilization ratio carries out wet type fires, become high-intensity building materials, for aspects such as road pavement, buildings material and island construction, be specially adapted to the development & construction of remote island (such as Nansha Zhu Dao).
In order to achieve the above object, the present invention finds when studying hydrothermal hardening (a kind of method making the very long diagenetic process of nature sedimentary rock reproduce fast in laboratory), extra large sand directly can be solidified into material of construction (Wall or floor tile, paving tile, artificial marine habitat and ocean rivers bank protection etc.) by this method, avoid the chlorion of extra large sand and the contact of reinforcing bar, corroded steel reinforcement, ensures engineering safety.Concrete steps are as follows:
First measure extra large sand according to mass percent: slaked lime=60% ~ 90%:10% ~ 40%, is uniformly mixed and obtains mixture, then adds water, mixing, compression moulding obtains material of construction section bar green compact; Fire through wet type after the green compact demoulding and become material of construction product forms, through detecting, its folding strength can reach 20MPa ~ 24MPa;
Above-mentioned water is seawater, and add-on is 5% ~ 20% of extra large sand and niter mixture total weight amount;
Above-mentioned extra large sand is that the sandstone not passing through desalination process by marine denudation obtained directly is exploited on seashore, when preparation is more than or equal to the material of construction product forms of 240mm × 115mm × 53mm common brick size, the extra large sand of direct selection initial size, when preparation is less than the material of construction product forms of common brick size, be 100 orders by extra large sand grinding, to meet material of construction structural performance requirements;
Above-mentioned wet type is fired as green compact are placed in hydrothermal reaction kettle, at 120 DEG C ~ 240 DEG C, carry out hydrothermal hardening 9h ~ 24h;
Above-mentioned material of construction product forms is wall brick, floor tile, paving tile, artificial marine habitat and ocean rivers bank protection material of construction.
Advantage of the present invention and effect are:
1, because but the present invention have selected the low extra large sand of rich reserves utilization ratio, wet type process for calcining low temperature wet type is utilized to solidify extra large sand technology, because of its temperature low (<240 DEG C), energy consumption is about 1/6 of Low fire ceramic material, therefore the carrying capacity of environment of production process is little, and low temperature can not destroy the internal structure of material of construction product, therefore the inventive method low-loss and energy-saving, achieves making full use of of sea sand resources, meets China island and builds instant actual needs.
2, owing to adding slaked lime when extra large sand is solidified into high-intensity building materials by the present invention, and adopt the wet type process for calcining of the diagenetic process of simulation sedimentary rock, the product density obtained is greater than Portland cement, rate of perviousness is less than Portland cement, salt not easily oozes out, and solves a difficult problem for salinity (chlorion) corroded steel reinforcement in extra large sand, avoids corrosion.
3, because extra large sand solidification is prepared the high-strength building materials such as wall brick, floor tile, pavior brick, paving tile, artificial marine habitat and rivers bank protection material by the present invention, the material of construction use procedure of these high strength does not directly contact with reinforcing bar, therefore there is not Chloride Attack reinforcing bar problem.
4, because the principle of the present invention sea sand solidification process is different from hardening of cement mechanism, the method Zhong Yan branch that wet type is burnt till participates in reaction, the solubleness of other reactants can be increased on the one hand due to doping principle, be conducive to the carrying out reacted, the reaction of final salt branch consumes, and generates class hydrolysis product of cement on the other hand: hydrated calcium silicate (CaO-SiO
2-H
2o, C-S-H), these sheet hydrated calcium silicates be interweaved together are filled in the gap between the surface of the microscopic particles in material of construction and microscopic particles, improve the density of material, cause material of construction folding strength to reach more than 20MPa, the folding strength of Portland cement is 5MPa ~ 10MPa.
5, the present invention gathers materials on the spot and extra large sand is become material of construction, and save the cost building island and time widely, the high-intensity building materials such as the wall brick simultaneously made, floor tile, pavior brick, paving tile and rivers bank protection use on island, both there is economic benefit, also there is social benefit.
Accompanying drawing explanation
Fig. 1 is process flow diagram of the present invention.
Fig. 2 is the addition of water of the present invention is cured as the folding strength of material of construction sample impact on extra large sand.
Fig. 3 is slaked lime content of the present invention is cured as the folding strength of material of construction sample impact on extra large sand.
Fig. 4 is the impact extra large sand being cured as to the folding strength of material of construction sample set time of the present invention.
Fig. 5 is solidification value of the present invention is cured as the folding strength of material of construction sample impact on extra large sand.
Fig. 6 is the infrared curvilinear motion of solidification treatment of the present invention forward and backward material of construction sample.
Fig. 7 is the XRD curvilinear motion of the forward and backward material of construction sample of solidification treatment of the present invention.
Fig. 8 is the SEM figure of material of construction sample before solidification treatment of the present invention.
Fig. 9 is the SEM figure of material of construction sample after solidification treatment of the present invention.
Embodiment
The present invention is further illustrated below by embodiment.
Embodiment 1:
First, as Fig. 1 technical process using extra large sand as main raw material, extra large sand wet type is fired as material of construction sample.
First by extra large sand grinding, cross 100 mesh sieves, measure the extra large sand of grinding: commercially available analytically pure slaked lime powder=75%:25% mass percent, stir and obtain mixture, then seawater is added afterwards, the add-on of seawater is 15% mass percent of extra large sand and slaked lime powder gross weight, under tabletting machine (model FY-15), miniature brick green compact are pressed into after stirring, the miniature brick green compact suppressed are put into hydrothermal reactor as material of construction sample, solidification treatment 10h under the fit saturated vapor pressure of 200 DEG C, finally, obtain high-intensity building materials sample.
Respectively the miniature brick green compact suppressed and wet type are fired the high-intensity building materials sample (miniature brick) obtained and carry out analytical test, by comparison diagram 8 and Fig. 9, can find out that the SEM pattern of solidification treatment forward and backward material of construction sample there occurs large change: Fig. 8 is the SEM figure of untreated material of construction sample (miniature Green body brick), as can be seen from Fig. 8, before process, larger extra large sand loose particles be deposited in together, between particle, gap is larger.
Fig. 9 is the SEM figure of the high-intensity building materials sample (miniature brick) at 200 DEG C after solidification treatment 10h, can find out, between the macrobead of sea sand or large particle surface creates the C-S-H crystal of a large amount of sheet, these crystal are effectively filled with the gap of original comparatively loose particle, cured body density is increased substantially, thus intensity is improved.
Below according to the technique of embodiment 1, by changing the variable such as water addition, slaked lime content, reaction times, temperature of reaction of test, the data image be cured is to further illustrate the present invention.
Please see Figure 2, in extra large sand and slaked lime powdered mixture, add the seawater being equivalent to extra large sand and slaked lime powder mixture quality 0,5%, 10%, 15%, 20%, after compression moulding, under the condition of 200 DEG C, solidify 10h.Through detecting, as can be seen from Figure 2, when not adding water, its folding strength is zero to its folding strength, because it cannot be shaping.Along with the increase of the addition of water, folding strength increases to some extent, and when addition is 15%, folding strength is 17MPa to the maximum.When addition is more than 20%, sample pressing process has water to ooze out to make it to reach higher.Therefore select suitable water add-on can accelerate the rate of mass transfer of solid particulate, promote that reaction is carried out, improve the intensity of cured body.
Fig. 3 is the impact of slaked lime content on folding strength after the solidification of material of construction sample.In extra large sand, add slaked lime, make the weight percentage of slaked lime be 0,5%, 10%, 15%, 20%, 25%, 30%, 40%, and add the seawater of extra large sand and slaked lime powder mixture quality 15%, after same compression moulding, at 200 DEG C, solidify 10h.Through detecting, as can be seen from Figure 3, along with the increase of slaked lime content, folding strength first increases rear reduction to its folding strength, and when slaked lime add-on is 25%, folding strength is close to 22MPa.Tobermorite is generated because the slaked lime added can react with crystalline phases such as the quartz in extra large sand, increase cured body folding strength, so the increase of add-on along with slaked lime, the folding strength of high-intensity building materials sample significantly increases, but too much slaked lime adds and has side effect to intensity on the contrary.
Fig. 4 is the impact of set time on folding strength after the solidification of material of construction sample.As embodiment 1 will containing 25% slaked lime, add the material of construction sample (green compact) of the seawater of 15%, at 200 DEG C, solidify 0h, 3h, 6h, 9h, 10h, 11h, 12h, 24h, 48h (wherein 0h refers to that uncured reacts direct test sample folding strength).Through detecting, as can be seen from Figure 4, initial reaction stage (9h in the past), probe intensity increases sharply its folding strength, and after arrival 9h, the intensity entirety that slightly declines still keeps ascendant trend.When to consider after 9h intensity increase less and 9h, folding strength is close to 18MPa, and in order to arrive the object of energy-conserving and environment-protective, the set time for material of construction sample the best is chosen as 9h.
Fig. 5 is the impact of solidification value on folding strength after the solidification of material of construction sample.As embodiment 1 containing 25% slaked lime, will be added the material of construction sample of the seawater of 15%, solidify 10h under the condition of 120 DEG C, 160 DEG C, 200 DEG C, 240 DEG C.Through detecting, as can be seen from Figure 5, along with the raising of temperature of reaction, folding strength significantly increases its folding strength, and 160 DEG C time, intensity arrives about 24MPa.Temperature continues to raise, and folding strength decreases on the contrary, tends towards stability, still keep higher folding strength after 200 DEG C.In conjunction with folding strength and cost, the set time for material of construction sample the best is chosen as 160 DEG C.
Fig. 6 is the infrared curvilinear motion of solidification treatment forward and backward material of construction sample.The curve of band circle represents the infrared curve of untreated material of construction sample, with the infrared curve of leg-of-mutton curve representative at 200 DEG C after solidification treatment 10h.Research is pointed out, the infrared absorption peak relevant with the primary product C-S-H in hardening of cement process appears at 970cm
-1near.After hydrothermal hardening, 1200-900cm in collection of illustrative plates
-1the peak of regional extent is obviously to 970cm
-1skew, demonstrates the appearance of hydrated product.
Fig. 7 is the XRD curvilinear motion of material of construction sample before and after solidification treatment.Below (0h) curve represents the XRD curve of untreated material of construction sample, the XRD curve of top (10h) curve representative at 200 DEG C after solidification treatment 10h.Indicate as can be seen from Fig. 7, generate T (representing tobermorite) after solidification, it is a kind of hydrate of silicate, makes intensity enhancing.
Embodiment 2:
First, choose seashore and directly exploit the sandstone of the process desalination process by marine denudation obtained as raw material, measure extra large sand: slaked lime powder=70%:30% mass percent, seawater is added after stirring, the add-on of seawater is 10% mass percent of extra large sand and slaked lime gross weight, compression moulding in the mould of prevailing roadway brick after stirring, obtains prevailing roadway brick green compact; Finally, the prevailing roadway brick green compact suppressed are put into hydrothermal reactor, and solidification treatment 10h under the fit saturated vapor pressure of 160 DEG C, obtains prevailing roadway brick.Through detecting, its folding strength can reach 20MPa.
Embodiment 3:
First, choosing extra large sand is raw material, measures extra large sand: slaked lime powder=80%:20% mass percent, then adds the seawater of extra large sand and slaked lime gross weight 15%, and the mould putting into cement reef after stirring is pressed into cement reef green compact; Finally, the green compact suppressed are put into hydrothermal reactor, solidification treatment 10h under the fit saturated vapor pressure of 240 DEG C, obtain artificial marine habitat (cement reef).Through detecting, its folding strength can reach 20MPa.
Embodiment 4:
First, choosing extra large sand is raw material, measures extra large sand: slaked lime powder=75%:25% mass percent, then adds the seawater of powder gross weight 20%, and the mould compacting of putting into bank protection material after stirring obtains bank protection material green compact; Finally, the green compact suppressed are put into hydrothermal reactor, solidification treatment 12h under the fit saturated vapor pressure of 200 DEG C, obtains bank protection material.Through detecting, its folding strength can reach 20MPa.
Claims (1)
1. one kind extra large sand wet type is fired the method becoming high-intensity building materials, it is characterized in that: first measure extra large sand according to mass percent: slaked lime=60% ~ 90%:10% ~ 40%, be uniformly mixed and obtain mixture, then seawater is added, mixing, compression moulding, obtains material of construction section bar green compact; Fire through wet type after the green compact demoulding and become material of construction product forms; Through detecting, its folding strength can reach 20MPa ~ 24MPa;
The add-on of above-mentioned seawater is 5% ~ 20% of extra large sand and niter mixture total weight amount;
Above-mentioned extra large sand is that the sandstone not passing through desalination process by marine denudation obtained directly is exploited on seashore, when preparation is more than or equal to the material of construction product forms of 240mm × 115mm × 53mm common brick size, the extra large sand of direct selection initial size, when preparation is less than the material of construction product forms of common brick size, be 100 orders by extra large sand grinding, to meet material of construction structural performance requirements;
Above-mentioned wet type is fired as green compact are placed in hydrothermal reactor, at 120 DEG C ~ 240 DEG C, carry out hydrothermal hardening 9h ~ 24h;
Above-mentioned material of construction product forms is wall brick, floor tile, paving tile, artificial marine habitat and ocean rivers bank protection material.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106927737A (en) * | 2017-03-06 | 2017-07-07 | 同济大学 | A kind of preparation method of lime ground mass high-intensity building materials |
| CN108046738A (en) * | 2017-12-08 | 2018-05-18 | 上海海顾新材料科技有限公司 | A kind of low-temperature setting sea sand is the method for intelligent damping construction material |
| CN109701946A (en) * | 2018-12-31 | 2019-05-03 | 北京工业大学 | A kind of water-saving and environmental protection sea sand cleaning method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101844906A (en) * | 2010-04-15 | 2010-09-29 | 同济大学 | Method for preparing sediment mud and sand into high-intensity building materials through improving activity by calcination |
| CN102431081A (en) * | 2011-09-01 | 2012-05-02 | 同济大学 | Method for solidifying river sediment into building material under normal pressure |
| CN102557507A (en) * | 2012-02-29 | 2012-07-11 | 同济大学 | Method for preparing humidity-adjusting material from loess or sepiolite |
| CN102674729A (en) * | 2012-05-17 | 2012-09-19 | 同济大学 | Method for curing urban building waste at low temperature and normal pressure to produce building material |
-
2015
- 2015-03-06 CN CN201510100658.4A patent/CN104743998B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101844906A (en) * | 2010-04-15 | 2010-09-29 | 同济大学 | Method for preparing sediment mud and sand into high-intensity building materials through improving activity by calcination |
| CN102431081A (en) * | 2011-09-01 | 2012-05-02 | 同济大学 | Method for solidifying river sediment into building material under normal pressure |
| CN102557507A (en) * | 2012-02-29 | 2012-07-11 | 同济大学 | Method for preparing humidity-adjusting material from loess or sepiolite |
| CN102674729A (en) * | 2012-05-17 | 2012-09-19 | 同济大学 | Method for curing urban building waste at low temperature and normal pressure to produce building material |
Non-Patent Citations (1)
| Title |
|---|
| 孙光耀等: "建筑垃圾黏土砖的水热固化再利用", 《非金属矿》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106927737A (en) * | 2017-03-06 | 2017-07-07 | 同济大学 | A kind of preparation method of lime ground mass high-intensity building materials |
| CN106927737B (en) * | 2017-03-06 | 2019-07-05 | 同济大学 | A kind of preparation method of lime ground mass high-intensity building materials |
| CN108046738A (en) * | 2017-12-08 | 2018-05-18 | 上海海顾新材料科技有限公司 | A kind of low-temperature setting sea sand is the method for intelligent damping construction material |
| CN109701946A (en) * | 2018-12-31 | 2019-05-03 | 北京工业大学 | A kind of water-saving and environmental protection sea sand cleaning method |
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| CN104743998B (en) | 2016-08-24 |
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