Polycarboxylate Superplasticizer: Iyo Yekupedzisira Plasticizer yeKongiri

Overview

Polycarboxylate Superplasticizer(PCE) ndeyepamusoro-yepamusoro-inoderedza mvura-inoderedza admixture (HRWR) inoshandiswa mukongiri kuwedzera kushanda, kuderedza mvura, uye kuvandudza simba uye kusimba. Sechizvarwa chitsva cheplasticizer, PCE yakatsiva zvakanyanya zvechinyakare superplasticizers senge naphthalene sulfonates uye lignosulfonates nekuda kwehukuru hwayo hwekuparadzira kugona, kuchengetedza kudonha kwenguva refu, uye kuenderana nezvinhu zvakasiyana-siyana zvesimende. Iri pepa rinopa kuongorora kwakazara kwePCE, kusanganisira makemikari ayo, maitiro ekushanda, zvakanakira, zvikumbiro, matambudziko, uye maitiro emangwana.

1. Nhanganyaya

1.1 Chii chinonzi Plasticizer muKongiresi?

A plasticizer ikemikari yekuwedzera iyo inovandudza kushanda kwekongiri nekudzikisa zviri mukati memvura uchichengetedza kana kuwedzera kuyerera. Plasticizers akakamurwa kuva:

• Normal plasticizers (kuderedza mvura kusvika 15%)

• Superplasticizers (HRWRs) (kuderedza mvura pakati pe20-40%)

1.2 Chii chinonzi Polycarboxylate Superplasticizer (PCE)?

Polycarboxylate Superplasticizer ndeyepamusoro-inoshanda superplasticizer iyo inosimudzira kupararira simende uye inoderedza kushandiswa kwemvura uku ichichengetedza kushanda kwakanaka. Inoshandiswa zvakanyanya mukusimba kwepamusoro, kuzvibatanidza, uye ultra-high-performance kongiri (UHPC).

1.3 Kukosha kwePCE muTekinoroji Yemazuva Ano Concrete

Neindasitiri yekuvaka inoda kusimba, kusimba, uye kusimba kongiri, PCE inoita basa rakakosha mu:

• Zvivakwa zvepamusoro-soro nemabhiriji

• Self-compacting kongiri (SCC)

• Precast uye yakagadzirira-kusanganisa kongiri

• Infrastructure inoda kusimba kwepamusoro

1.4 Evolution yeSuperplasticizers

Iko kuvandudzwa kwe superplasticizers kwakashanduka kuburikidza nezvizvarwa zvakasiyana:

1. Chizvarwa Chekutanga - Lignosulfonates

2. Chizvarwa Chechipiri - Sulfonated naphthalene formaldehyde (SNF) uye sulfonated melamine formaldehyde (SMF)

3. Chizvarwa chechitatu - Polycarboxylate-based superplasticizers (PCE)

PCEinopa kuderedzwa kwemvura kwepamusoro, kuchengetedza kwakarebesa, uye kuenderana kwakagadziridzwa nezvinhu zvesimende, zvichiita kuti ive yepurasitiki inoshanda zvakanyanya nhasi.

2. Kuumbwa Kwemakemikari uye Kushanda Mechanism yePCE

2.1 Kuumbwa Kwemakemikari ePCE

PCE inoumbwa ne:

• A polycarboxylate musana unosungirira kune zvimedu simende.

• Side cheni (polyethylene glycol kana macompounds akafanana) anopa steric chipingamupinyi kudzivirira flocculation.

2.2 Kushanda Mechanism

PCE inoshanda zvakanyanya kuburikidza nenzira mbiri:

2.2.1 Electrostatic Repulsion

Iyo carboxylate (-COO⁻) mapoka paPCE mamorekuru adsorb pamusoro pemasimende masimende, achiunza mhosva dzisina kunaka dzinodzosera mumwe nemumwe, kudzivirira kuunganidzwa kwechikamu.

2.2.2 Steric Hindrance Effect

Macheni akareba emativi anogadzira chipingamupinyi chemuviri pakati pezvimedu zvesimende, kudzivirira kuunganazve uye kuvandudza kupararira.

Izvi zvinokonzeresa:

• Kuwedzera fluidity pasina kuwedzera mvura yakawandisa.

• Zvirinani simende hydration inotungamira kusimba rakawedzerwa uye kusimba.

• Kurebesa kuderera kwekuchengetedza kwekuwedzera kushanda.

3. Zvakanakira zvePolycarboxylate Superplasticizer

3.1 Kuderedza Mvura Yakanyanya

PCE inogonesa kusvika ku40% kuderedza mvura, zvakanyanya kuderedza mvura-ku-samende (W / C) chiyero apo ichichengetedza kuyerera.

3.2 Kuwedzeredzwa Kwekushanda uye Kuchengeta Slump

PCE-yakagadziridzwa kongiri inochengetedza kushanda kwayo kweanopfuura maawa maviri, ichiita kuti ive yakanaka kune yakagadzirira-musanganiswa uye precast application.

3.3 Kuwedzera Simba uye Kusimba

Nemvura shoma, PCE inovandudza:

• Early compressive simba rekukurumidza kuvaka kutenderera.

• Yekupedzisira simba repamusoro-mutoro maapplication.

• Durability, kuderedza shrinkage, kuputika, uye permeability.

3.4 Yakaderedzwa Shrinkage uye Kutsemuka

Mvura yakaderera inoderedza kuomeswa uye kukambaira, kudzivirira kutsemuka nekufamba kwenguva.

3.5 Mabhenefiti ezvakatipoteredza uye zveupfumi

PCE inoderedza kudiwa kwesimende, kucheka CO₂ emissions uye mari yezvinhu, zvichibatsira pakuvaka kwakasimba.

4. Zvishandiso zvePolycarboxylate Superplasticizer

4.1 High-Performance Concrete (HPC)

HPC, inoda simba rakakura uye kusimba, inovimba nePCE kune yakakwana yemvura-simende chiyero.

4.2 Self-Compacting Concrete (SCC)

PCE inobvumira SCC kuyerera pasi pehuremu hwayo, ichibvisa kudiwa kwekuzunguza uku ichisimbisa yunifomu compaction.

4.3 Precast Concrete

Mune precast kongiri, PCE inovimbisa kukurumidza simba kuwana, kuderedza kudhiza nguva uye kuwedzera kugadzirwa kwekuita.

4.4 Yepamusoro-Yepamusoro-Kuita Kongiri (UHPC)

UHPC, inoshandiswa munzvimbo dzakanyanya-kushushikana, inobatsira kubva pakukwanisa kwePCE kudzikisa zviri mukati memvura uchichengetedza kushanda.

4.5 Yakagadzirira-Mix Concrete

PCE inochengetedza kutakura kureba, kuchengetedza kongiri inoshanda kwenguva yakareba.

5. Mhedzisiro yePCE pane Concrete Properties

5.1 Fresh Concrete Properties

• Kuvandudzwa kwekuyerera kwekuisa nyore.

• Kuwedzera kushanda pasina kupatsanurwa kana kubuda ropa.

• Inodzorwa kuseta nguva, inogadziriswa neanodzoreredza kana accelerator.

5.2 Zvinhu Zvakaoma Kongiri

• Higher compressive uye tensile simba.

• Kuderera kwemvura, kunatsiridza kuramba kune chando-thaw kutenderera uye sulfate kurwiswa.

• Yakaderedzwa shrinkage uye zvinokambaira, kudzivirira deformation kwenguva refu.

6. Kuenderana kwePCE nemamwe maAdmixtures

6.1 Supplementary Cementitious Materials (SCMs)

PCE inowirirana nenhunzi ash, slag, uye silica fume, inogadzirisa reactivity yavo uye hydration.

6.2 Kudyidzana nemamwe maAdmixtures

• Vagadziri vanowedzera nguva yekuseta kana zvichidikanwa.

• Accelerators inomhanyisa kuwana simba kune inokurumidza-track mapurojekiti.

• Mhepo-Entraining Agents (AEAs) inovandudza kutonhora-kunyungudika kuramba asi inoda kugadziridza dosage.

7. Matambudziko nezvinogumira

7.1 Matambudziko eKuwedzeredza

PCE yakawandisa inogona kukonzera kunonoka zvakanyanya, kupatsanurwa, kana kubuda ropa.

7.2 Sensitivity kune Simende Kuumbwa

Kuita kwePCE kunoenderana nerudzi rwesimende, kunaka, uye kuumbwa kwemamineral, zvinoda pre-application bvunzo.

7.3 Mari Inotariswa

PCE inodhura kupfuura yakajairwa mapurasitiki, asi kushanda kwayo uye mabhenefiti enguva refu anoruramisa mutengo.

8. Future Trends uye Innovations

8.1 Smart Admixtures uye Inopindura PCE

Mishonga mitsva inobvumira kugadziriswa kwechokwadi-nguva mu fluidity uye nguva yekuisa zvichienderana nemamiriro ezvakatipoteredza.

8.2 Bio-Yakavakirwa uye Eco-Hushamwari Superplasticizers

Tsvagiridzo inotarisa pane biodegradable PCE dzimwe nzira dzekuwedzera kuderedza kukanganiswa kwezvakatipoteredza.

8.3 Nano-Modified PCEs

Nanotechnology iri kushandiswa kukwidziridza simende-particle dispersion uye optimize hydration.

Polycarboxylate Superplasticizerndiyo inonyanya kushanda plasticizer yekongiri yemazuva ano, inopa:

• Kuderedza mvura yepamusoro

• Kuwedzera kushanda nesimba

• Eco-hushamwari uye inodhura-inoshanda mhinduro

Kunyangwe zvipingamupinyi zvidiki, PCE inoramba iri iyo yakasarudzika superplasticizer yepamusoro-inoshanda, yakasimba, uye yakagadzikana kongiri yekushandisa. Kufambira mberi kweramangwana kucharamba kuchiwedzera kuita kwayo, zvichiwedzera kushandura indasitiri yekuvaka.