{"id":15309,"date":"2026-08-14T02:39:30","date_gmt":"2026-08-14T02:39:30","guid":{"rendered":"https:\/\/tenessy.com\/?p=15309"},"modified":"2026-08-14T02:39:39","modified_gmt":"2026-08-14T02:39:39","slug":"kendiliginden-sikisan-beton-scc-icindeki-pce","status":"publish","type":"post","link":"https:\/\/tenessy.com\/tr\/kendiliginden-sikisan-beton-scc-icindeki-pce\/","title":{"rendered":"Kendili\u011finden S\u0131k\u0131\u015fan Beton (SCC) \u0130\u00e7inde PCE: Avantajlar\u0131 ve Dozaj\u0131"},"content":{"rendered":"
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Kendili\u011finden s\u0131k\u0131\u015fan betondaki PCE, y\u00fcksek ak\u0131\u015fkanl\u0131k ve kohezyon aras\u0131nda m\u00fckemmel bir denge sa\u011flayan temel bile\u015fendir; bu sayede SCC, herhangi bir titre\u015fim olmaks\u0131z\u0131n kal\u0131ba ve donat\u0131lar\u0131n etraf\u0131na akabilir. Bu k\u0131lavuzda, polikarboksilat s\u00fcperplastikle\u015ftiricinin neden SCC i\u00e7in benzersiz bir \u015fekilde uygun oldu\u011fu, kar\u0131\u015f\u0131m\u0131n nas\u0131l tasarlanaca\u011f\u0131, PCE'nin nas\u0131l dozajlanaca\u011f\u0131 ve ayarlanaca\u011f\u0131 ile ayr\u0131\u015fma ve kanaman\u0131n nas\u0131l \u00f6nlenece\u011fi a\u00e7\u0131klanmaktad\u0131r.<\/p>

Giri\u015f<\/h2>

Kendili\u011finden s\u0131k\u0131\u015fan beton (SCC), sadece i\u015f\u00e7ilikten tasarruf sa\u011flamakla kalmaz, ayn\u0131 zamanda daha kaliteli yap\u0131lar ortaya \u00e7\u0131kar\u0131r. Kendi a\u011f\u0131rl\u0131\u011f\u0131yla kal\u0131ba akarak yerle\u015fti\u011fi i\u00e7in, karma\u015f\u0131k kal\u0131plar\u0131n her k\u00f6\u015fesine ula\u015f\u0131r, yo\u011fun donat\u0131lar\u0131n etraf\u0131n\u0131 s\u0131k\u0131ca doldurur ve titre\u015fime dayal\u0131 betonun s\u0131k\u0131\u015f\u0131k kesitlerde maruz kald\u0131\u011f\u0131 petek yap\u0131s\u0131 ve bo\u015fluklar\u0131 ortadan kald\u0131r\u0131r. 1980\u2019lerin sonlar\u0131nda Japonya\u2019da, kalifiye vibrat\u00f6r operat\u00f6rleri eksikli\u011fine \u00e7\u00f6z\u00fcm olarak geli\u015ftirilen SCC, g\u00fcn\u00fcm\u00fczde d\u00fcnya \u00e7ap\u0131nda y\u00fcksek katl\u0131 binalar\u0131n \u00e7ekirdekleri, t\u00fcnel kaplamalar\u0131, prekast elemanlar ve mimari beton uygulamalar\u0131nda standart bir y\u00f6ntem haline gelmi\u015ftir.<\/p>

Ancak SCC, kar\u0131\u015f\u0131m tasar\u0131mc\u0131s\u0131ndan ayn\u0131 anda iki z\u0131t talebi kar\u015f\u0131lamas\u0131n\u0131 ister: ak\u0131\u015f ve kendili\u011finden yay\u0131lma i\u00e7in yeterince ak\u0131\u015fkan, ancak iri agrega hi\u00e7bir zaman dibe \u00e7\u00f6kmemesi i\u00e7in yeterince kohezif olmas\u0131. Bunun \u00e7\u00f6z\u00fcm\u00fc, d\u00fc\u015f\u00fck su-toz oran\u0131, \u00f6zenle derecelendirilmi\u015f bir agrega iskeleti ve \u00e7ok d\u00fc\u015f\u00fck su i\u00e7eri\u011finde kar\u0131\u015f\u0131m\u0131 ak\u0131\u015fkanla\u015ft\u0131ran bir s\u00fcperplastikle\u015ftiricidir. Kendili\u011finden s\u0131k\u0131\u015fan betondaki PCE, i\u015fte bu s\u00fcperplastikle\u015ftiricidir \u2014 25\u201340% su azaltma \u00f6zelli\u011fi ve uzun \u00e7\u00f6kme s\u00fcreyi koruma \u00f6zelli\u011fi, onu pratikte SCC\u2019yi g\u00fcvenilir bir \u015fekilde sa\u011flayan tek kimyasal madde haline getirir. Bu makale, bunun nedenini ve nas\u0131l dozajlanaca\u011f\u0131n\u0131 ele almaktad\u0131r.<\/p>

\"Kendili\u011finden<\/p>

SCC\u2019nin Neden PCE\u2019yi Gerektirdi\u011fi: Ak\u0131\u015fkanl\u0131k, Kohezyon ve Kararl\u0131l\u0131k<\/h2>

SCC \u00c7al\u0131\u015fma Aral\u0131\u011f\u0131<\/h3>

Geleneksel titre\u015fimli beton, titre\u015fim enerjisinin ak\u0131\u015f eksikli\u011fini telafi etmesi nedeniyle geni\u015f bir i\u015flenebilirlik aral\u0131\u011f\u0131na tolerans g\u00f6sterir. SCC\u2019de ise b\u00f6yle bir tolerans yoktur. SCC, tamam\u0131 standart testlerle \u00f6l\u00e7\u00fclen \u00fc\u00e7 \u00f6zellik taraf\u0131ndan tan\u0131mlanan dar bir \u00e7al\u0131\u015fma aral\u0131\u011f\u0131 i\u00e7inde tasarlanmal\u0131d\u0131r:<\/p>

  1. Dolum kapasitesi (yay\u0131lma):<\/strong> Slump ak\u0131\u015f testi ile \u00f6l\u00e7\u00fclm\u00fc\u015ft\u00fcr (EN 12350-8 \/ ASTM C1611). Tipik bir SCC\u2019nin yay\u0131lma mesafesi 600\u2013750 mm\u2019dir; ~550 mm\u2019nin alt\u0131nda ise kendili\u011finden s\u0131k\u0131\u015fmaz.<\/li><\/ol>
    1. Pas verme yetene\u011fi:<\/strong> L-kutusu, U-kutusu veya J-halkas\u0131 testleriyle \u00f6l\u00e7\u00fcld\u00fc\u011f\u00fcnde, kar\u0131\u015f\u0131m \u00e7ubuklar aras\u0131ndaki dar bo\u015fluklardan t\u0131kanmadan ge\u00e7melidir.<\/li><\/ol>
      1. Ayr\u0131\u015fma direnci (kararl\u0131l\u0131k):<\/strong> Eleme ayr\u0131\u015fmas\u0131 testi (EN 12350-11) ile \u00f6l\u00e7\u00fcl\u00fcr. 5 mm elekten kay\u0131p, 15\u201320%\u2019nin alt\u0131nda kalmal\u0131d\u0131r.<\/li><\/ol>

        \u00c7eli\u015fki a\u00e7\u0131kt\u0131r: Ak\u0131\u015fkanl\u0131k, daha fazla su ve daha fazla ince tanecik (daha fazla hamur) y\u00f6n\u00fcnde etki ederken, stabilite ise daha az su ve daha sert bir hamur y\u00f6n\u00fcnde etki eder. PCE, bu \u00e7eli\u015fkiyi \u00e7\u00f6zen etken olarak i\u015flev g\u00f6r\u00fcr \u2014 hamurun viskozlu\u011funu ve kar\u0131\u015f\u0131m\u0131n stabilitesini koruyacak kadar d\u00fc\u015f\u00fck bir su i\u00e7eri\u011finde ak\u0131\u015fkanl\u0131\u011f\u0131 sa\u011flar.<\/p>

        SCC Sisteminde PCE\u2019nin Rol\u00fc<\/h3>

        Bir SCC kar\u0131\u015f\u0131m\u0131nda, her bile\u015fenin kendine \u00f6zg\u00fc bir i\u015flevi vard\u0131r:<\/p>

        Bile\u015fen<\/p><\/td>

        SCC\u2019deki Rol\u00fc<\/p><\/td><\/tr>

        Hamur hacmi (\u00e7imento + dolgu maddeleri + su + katk\u0131 maddesi)<\/p><\/td>

        Toplam hacmin 35\u201340%\u2019si \u2014 agregalar\u0131 kaplamak ve ta\u015f\u0131mak i\u00e7in yeterli miktar<\/p><\/td><\/tr>

        Toz (\u00e7imento + kire\u00e7ta\u015f\u0131 veya di\u011fer dolgu maddeleri)<\/p><\/td>

        400\u2013600 kg\/m\u00b3 \u2014 kohezyon ve viskozite sa\u011flar<\/p><\/td><\/tr>

        Su-toz oran\u0131<\/p><\/td>

        Hacimce %0,30\u20130,42 \u2014 kararl\u0131l\u0131k a\u00e7\u0131s\u0131ndan yeterince d\u00fc\u015f\u00fck<\/p><\/td><\/tr>

        Kaba agrega<\/p><\/td>

        \u2264 50% kat\u0131 hacim, maksimum boyut \u2264 20 mm \u2014 in\u015faat demirinden ge\u00e7ebilecek kadar k\u00fc\u00e7\u00fck<\/p><\/td><\/tr>

        PCE<\/p><\/td>

        D\u00fc\u015f\u00fck su seviyesinde ak\u0131\u015fkanl\u0131k sa\u011flar; ak\u0131\u015f\u0131 uzun s\u00fcre boyunca s\u00fcrd\u00fcr\u00fcr<\/p><\/td><\/tr><\/tbody><\/table>

        PCE olmadan, 0,35 su-toz oran\u0131nda 650 mm \u00e7\u00f6kme ak\u0131\u015f\u0131na ula\u015fmak i\u00e7in, uygulanamaz d\u00fczeyde a\u015f\u0131r\u0131 miktarda toz veya su kullan\u0131lmas\u0131 gerekir \u2014 ilki ekonomik de\u011fildir, ikincisi ise ayr\u0131\u015fmaya neden olur. PCE, ak\u0131\u015fkanl\u0131\u011f\u0131 su i\u00e7eri\u011finden ba\u011f\u0131ms\u0131z hale getirir: \u00e7imentoyu o kadar iyi da\u011f\u0131t\u0131r ki, ayn\u0131 miktarda suyla \u00e7ok daha ince bir hamur elde edilir. Bu, SCC'nin fiziksel temelidir.<\/p>

        Neden PNS ya da Lignos\u00fclfonat De\u011fil?<\/h3>

        Do\u011fal olarak \u015fu soru akla geliyor: Daha ucuz bir s\u00fcper ak\u0131\u015fkanla\u015ft\u0131r\u0131c\u0131 bu i\u015fi g\u00f6rebilir mi? Pratik cevap, \u00fc\u00e7 nedenden \u00f6t\u00fcr\u00fc hay\u0131r:<\/p>

        1. Su tasarrufu \u00fcst s\u0131n\u0131r\u0131:<\/strong> PNS de\u011feri yaln\u0131zca 15\u201325% aral\u0131\u011f\u0131na ula\u015f\u0131r \u2014 bu de\u011fer, SCC\u2019nin kararl\u0131 kald\u0131\u011f\u0131 d\u00fc\u015f\u00fck su-toz oranlar\u0131 i\u00e7in genellikle yeterli de\u011fildir.<\/li><\/ol>
          1. Ak\u0131\u015f kayb\u0131:<\/strong> PNS, 30\u201360 dakika i\u00e7inde i\u015flenebilirli\u011fini yitirir; SCC ise nakliye ve d\u00f6k\u00fcm i\u015flemleri boyunca ak\u0131\u015fkanl\u0131\u011f\u0131n\u0131 korumal\u0131d\u0131r.<\/li><\/ol>
            1. Geli\u015fim gerili\u011fi sorunlar\u0131:<\/strong> Lignos\u00fclfonat\u0131n g\u00fc\u00e7l\u00fc priz geciktirme \u00f6zelli\u011fi ve \u0131l\u0131ml\u0131 su azaltma etkisi, onu birincil katk\u0131 maddesi olarak kullan\u0131lamaz hale getirir; ancak baz\u0131 d\u00fc\u015f\u00fck maliyetli SCC \u00e7e\u015fitlerinde yer almaktad\u0131r.<\/li><\/ol>

              PCE\u2019nin sterik engel mekanizmas\u0131 (bkz. bizim polikarboksilat s\u00fcperplastikle\u015ftirici k\u0131lavuzu<\/a>) g\u00f6zenek \u00e7\u00f6zeltisindeki iyonik g\u00fcce duyarl\u0131 de\u011fildir; bu nedenle, SCC\u2019nin gerektirdi\u011fi \u00e7ok d\u00fc\u015f\u00fck su\/\u00e7imento oran\u0131nda da etkinli\u011fini s\u00fcrd\u00fcr\u00fcr \u2014 bu, y\u00fck temelli dispersanlar\u0131n ayn\u0131 dozajda kesinlikle ba\u015faramayaca\u011f\u0131 bir \u015feydir.<\/p>

              SCC i\u00e7in Kar\u0131\u015f\u0131m Tasar\u0131m\u0131 ve PCE Dozaj\u0131<\/h2>

              Kar\u0131\u015f\u0131m Tasar\u0131m S\u00fcreci (K\u0131saca)<\/h3>

              SCC kar\u0131\u015f\u0131m tasar\u0131m\u0131, macunla ba\u015flar ve d\u0131\u015fa do\u011fru ilerler:<\/p>

              1. Toplam derecelendirmeyi ayarla:<\/strong> Toplam agrega hacmi 55\u201365%, iri agrega hacmi \u2264 50%, maksimum boyut genellikle 16\u201320 mm.<\/li><\/ol>
                1. Toz miktar\u0131n\u0131 se\u00e7in:<\/strong> 400\u2013600 kg\/m\u00b3 \u00e7imento + dolgu maddeleri (kire\u00e7ta\u015f\u0131 tozu, klasik ve ekonomik bir se\u00e7imdir). Hamur hacmi, kar\u0131\u015f\u0131m\u0131n 35\u201340%\u2019si kadar olmal\u0131d\u0131r.<\/li><\/ol>
                  1. Su-toz oran\u0131n\u0131 ayarlay\u0131n:<\/strong> Hacimce %0,35 ile ba\u015flay\u0131n (tipik aral\u0131k: %0,32\u2013%0,38). Kar\u0131\u015f\u0131m \u00e7ok kuruysa miktar\u0131 art\u0131r\u0131n, ayr\u0131\u015f\u0131yorsa azalt\u0131n.<\/li><\/ol>
                    1. PCE s\u0131n\u0131f\u0131n\u0131 se\u00e7in:<\/strong> 60\u2013120 dakikal\u0131k bekletme s\u00fcresine sahip, su emilimini y\u00fcksek oranda azaltan bir \u00fcr\u00fcn; uzun mesafeli, s\u0131cak hava ko\u015fullar\u0131nda kullan\u0131lacak SCC i\u00e7in, eter ba\u011fl\u0131, uzun bekletme s\u00fcresine sahip bir \u00fcr\u00fcn.<\/li><\/ol>
                      1. PCE'yi dozlay\u0131n:<\/strong> Toz \u00fczerinde 0,15\u20130,201 TP3T aktif kat\u0131 madde oran\u0131ndan ba\u015flay\u0131n ve k\u00fc\u00e7\u00fck ad\u0131mlarla ayarlay\u0131n.<\/li><\/ol>

                        PCE Doz Aral\u0131\u011f\u0131 ve Ayarlama Kurallar\u0131<\/h3>

                        SCC\u2019de PCE i\u00e7in \u00e7al\u0131\u015fma aral\u0131\u011f\u0131, toplam tozun (\u00e7imento + mineral katk\u0131 maddeleri) a\u011f\u0131rl\u0131\u011f\u0131 baz\u0131nda %0,15\u20130,301 TP3T aktif kat\u0131 maddedir. Birka\u00e7 pratik kural:<\/p>

                        • D\u00fc\u015f\u00fck seviyeden ba\u015flay\u0131n, k\u00fc\u00e7\u00fck ad\u0131mlar at\u0131n:<\/strong> 0,15% de\u011ferinden ba\u015flay\u0131n. \u00c7\u00f6kme ak\u0131\u015f\u0131n\u0131 \u00f6l\u00e7\u00fcn. Hedef yay\u0131lma mesafesine (\u00f6rne\u011fin, 650 mm) ula\u015f\u0131lana kadar 0,025\u20130,05%'lik ad\u0131mlarla art\u0131r\u0131n. 0,05%'lik bir a\u015fma bile kar\u0131\u015f\u0131m\u0131 kararl\u0131 durumdan ayr\u0131\u015fmaya ge\u00e7irebilir.<\/li><\/ul>
                          • Dozaj e\u011frisi dik:<\/strong> SCC\u2019de, PCE dozaj\u0131nda 0,05%\u2019lik bir de\u011fi\u015fiklik, genellikle \u00e7\u00f6kme ak\u0131\u015f\u0131n\u0131 50\u2013150 mm oran\u0131nda de\u011fi\u015ftirir. K\u00fc\u00e7\u00fck ayarlamalar, uzun kar\u0131\u015ft\u0131rma d\u00f6ng\u00fcleri ve sab\u0131r, bu konuda etkili y\u00f6ntemlerdir.<\/li><\/ul>
                            • Kar\u0131\u015ft\u0131rma s\u00fcresi \u00f6nemlidir:<\/strong> PCE\u2019nin tamamen da\u011f\u0131lmas\u0131 i\u00e7in 2\u20134 dakikal\u0131k y\u00fcksek kesme kuvvetli kar\u0131\u015ft\u0131rma gereklidir. K\u0131sa s\u00fcreli kar\u0131\u015ft\u0131rma, yan\u0131lt\u0131c\u0131 derecede d\u00fc\u015f\u00fck yay\u0131lma sonucu verir ve a\u015f\u0131r\u0131 dozlanmaya yol a\u00e7ar.<\/li><\/ul>
                              • Tutma e\u011frisini inceleyin:<\/strong> 0, 30, 60 ve 90. dakikalarda ak\u0131\u015fkanl\u0131k de\u011ferini \u00f6l\u00e7\u00fcn. \u0130yi bir SCC, 60. dakikada ba\u015flang\u0131\u00e7taki yay\u0131lma geni\u015fli\u011finin en az \u2019ini korur. Ak\u0131\u015fkanl\u0131k daha h\u0131zl\u0131 azal\u0131rsa, ya dozaj\u0131 art\u0131r\u0131n, ya da daha uzun kalma s\u00fcresine sahip bir \u00e7imento t\u00fcr\u00fcne ge\u00e7in ya da \u00e7imento-PCE uyumlulu\u011funu kontrol edin.<\/li><\/ul>

                                Temsili bir SCC kar\u0131\u015f\u0131m\u0131 (m\u00b3 ba\u015f\u0131na yakla\u015f\u0131k de\u011ferler)<\/h3>

                                Malzeme<\/p><\/td>

                                Miktar<\/p><\/td>

                                Notlar<\/p><\/td><\/tr>

                                \u00c7imento (CEM I 42,5)<\/p><\/td>

                                350 kg<\/p><\/td>

                                		\u00a0<\/td><\/tr>

                                Kire\u00e7ta\u015f\u0131 tozu<\/p><\/td>

                                150 kg<\/p><\/td>

                                Koyula\u015fma ve macun hacmi<\/p><\/td><\/tr>

                                Su<\/p><\/td>

                                180 L<\/p><\/td>

                                Su-toz oran\u0131 \u2248 0,36<\/p><\/td><\/tr>

                                \u0130nce kum (0\u20132 mm)<\/p><\/td>

                                750 kg<\/p><\/td>

                                		\u00a0<\/td><\/tr>

                                Kaba agrega (2\u201316 mm)<\/p><\/td>

                                800 kg<\/p><\/td>

                                50% toplam hacim<\/p><\/td><\/tr>

                                PCE (aktif kat\u0131 maddeler)<\/p><\/td>

                                1,1\u20131,5 kg<\/p><\/td>

                                Toz \u00fczerinde \u2248 0,22\u20130,301 TP3T<\/p><\/td><\/tr>

                                VMA (gerekirse)<\/p><\/td>

                                0,1\u20130,3 L\/m\u00b3<\/p><\/td>

                                Zay\u0131f kar\u0131\u015f\u0131mlar i\u00e7in stabilizat\u00f6r<\/p><\/td><\/tr>

                                Hava kar\u0131\u015ft\u0131r\u0131c\u0131 (gerekirse)<\/p><\/td>

                                gerekti\u011fi kadar<\/p><\/td>

                                Donma-\u00e7\u00f6z\u00fclme etkisine maruz kalma<\/p><\/td><\/tr><\/tbody><\/table>

                                Miktarlar\u0131 b\u00f6lgenizdeki malzemelere g\u00f6re ayarlay\u0131n \u2014 bu rakamlar bir ba\u015flang\u0131\u00e7 noktas\u0131d\u0131r, kesin bir tarif de\u011fildir.<\/p>

                                SCC\u2019de S\u0131k G\u00f6r\u00fclen Sorunlar: Ayr\u0131\u015fma, Kanama ve PCE Ayar\u0131n\u0131n Bunlar\u0131 Nas\u0131l Giderdi\u011fi<\/h2>

                                Sorun 1: Ayr\u0131mc\u0131l\u0131k<\/h3>

                                Belirti:<\/strong> Kaba agrega, taban\u0131nda veya ak\u0131\u015f y\u00f6n\u00fcnde \u00e7\u00f6kelerek harc\u0131 geride b\u0131rak\u0131r \u2014 bu durum, elek ayr\u0131\u015fma testi (kay\u0131p > 20%) ile veya \u00e7\u00f6kme ak\u0131\u015f testi s\u0131ras\u0131nda g\u00f6zle tespit edilir.<\/p>

                                Nedenleri:<\/strong> A\u015f\u0131r\u0131 su, a\u015f\u0131r\u0131 PCE, yetersiz toz i\u00e7eri\u011fi veya \u00e7ok y\u00fcksek iri agrega hacmi.<\/p>

                                D\u00fczeltmeler, tercih s\u0131ras\u0131na g\u00f6re:<\/strong><\/p>

                                1. PCE\u2019yi biraz d\u00fc\u015f\u00fcr\u00fcn<\/strong> \u2014 kar\u0131\u015f\u0131m, gerekenden daha ak\u0131\u015fkan; en ucuz ve en yayg\u0131n \u00e7\u00f6z\u00fcm.<\/li><\/ol>
                                  1. Kar\u0131\u015ft\u0131rma suyunu azalt\u0131n<\/strong> \u2014 daha d\u00fc\u015f\u00fck bir PCE dozunda spread hala hedefin \u00fczerindeyse.<\/li><\/ol>
                                    1. Toz i\u00e7eri\u011fini art\u0131r\u0131n<\/strong> (kire\u00e7ta\u015f\u0131 tozu) \u2014 macun miktar\u0131 artt\u0131k\u00e7a, viskozite artar ve agrega ta\u015f\u0131ma kapasitesi de artar.<\/li><\/ol>
                                      1. Bir viskozite de\u011fi\u015ftirici madde (VMA) ekleyin<\/strong> \u2014 istikrarl\u0131 ancak ak\u0131c\u0131 bir SCC i\u00e7in sa\u011flam bir se\u00e7enek (a\u015fa\u011f\u0131ya bak\u0131n\u0131z).<\/li><\/ol>
                                        1. Kaba agrega hacmini azalt\u0131n<\/strong> \u2014 Toplam notland\u0131rmay\u0131 yeniden g\u00f6zden ge\u00e7irin.<\/li><\/ol>

                                          Sorun 2: Kanama<\/h3>

                                          Belirti:<\/strong> Yerle\u015ftirildikten sonra y\u00fczeyde bir su tabakas\u0131 olu\u015fur; macun ince ve y\u00fczey zay\u0131ft\u0131r.<\/p>

                                          Nedenleri:<\/strong> Su-toz oran\u0131 \u00e7ok y\u00fcksek, PCE dozu fazla ya da zamanla su salan, ayarlamas\u0131 yetersiz bir tutma derecesi.<\/p>

                                          D\u00fczeltmeler:<\/strong><\/p>

                                          1. Su-toz oran\u0131n\u0131 azalt\u0131n<\/strong> \u2014 Hacimce %0,35, ba\u015flang\u0131\u00e7 i\u00e7in uygun bir \u00fcst s\u0131n\u0131rd\u0131r.<\/li><\/ol>
                                            1. PCE\u2019yi azalt\u0131n<\/strong> \u2014 Kanama, genellikle a\u015f\u0131r\u0131 dozun ilk belirtisidir.<\/li><\/ol>
                                              1. Para cezalar\u0131n\u0131\/toz miktar\u0131n\u0131 art\u0131r\u0131n<\/strong> \u2014 suyu tutmak i\u00e7in daha geni\u015f bir y\u00fczey alan\u0131.<\/li><\/ol>
                                                1. \u00c7imento-PCE kar\u0131\u015f\u0131m\u0131n\u0131 kontrol edin<\/strong> \u2014 Baz\u0131 \u00e7imento-PCE \u00e7iftleri, di\u011fer \u00e7imentolar i\u00e7in uygun olan dozaj seviyelerinde bile s\u0131z\u0131nt\u0131 yapmaktad\u0131r.<\/li><\/ol>

                                                  Sorun 3: Ak\u0131\u015f Kayb\u0131 (\u00c7ok H\u0131zl\u0131 Sertle\u015fme)<\/h3>

                                                  Belirti:<\/strong> Kar\u0131\u015f\u0131m, tesiste 650 mm geni\u015flikte yay\u0131l\u0131rken, 60 dakika sonra pompada sadece 450 mm geni\u015flikte yay\u0131l\u0131r.<\/p>

                                                  Nedenleri:<\/strong> Y\u00fcksek C3A i\u00e7eri\u011fine sahip \u00e7imento, s\u0131cak hava, d\u00fc\u015f\u00fck PCE dozu veya tutunma s\u00fcresi k\u0131sa olan bir PCE s\u0131n\u0131f\u0131.<\/p>

                                                  D\u00fczeltmeler:<\/strong><\/p>

                                                  1. Uzun tutma s\u00fcresine sahip (eter ba\u011flant\u0131l\u0131) bir PCE\u2019ye ge\u00e7in.<\/strong><\/li><\/ol>
                                                    1. Dozu 10\u201330% kadar art\u0131r\u0131n<\/strong> s\u0131cak havalarda.<\/li><\/ol>
                                                      1. Bir geciktiriciyi birlikte kullan\u0131n<\/strong> \u2014 bir gecede sertle\u015fme sorunlar\u0131n\u0131 \u00f6nlemek i\u00e7in dikkatlice.<\/li><\/ol>
                                                        1. Chase \u00e7imento tedarikinde tutarl\u0131l\u0131k<\/strong> \u2014 \u00c7imentonun kimyasal yap\u0131s\u0131 de\u011fi\u015firse, tutma \u00f6zelli\u011fi de buna paralel olarak de\u011fi\u015fir.<\/li><\/ol>

                                                          Sorun 4: Takviye Noktas\u0131nda T\u0131kanma<\/h3>

                                                          Belirti:<\/strong> Kar\u0131\u015f\u0131m ak\u0131\u015f testi sonu\u00e7lar\u0131n\u0131 ge\u00e7iyor ancak L-kutusunda ya da in\u015faat demirlerinin arkas\u0131nda t\u0131kan\u0131yor.<\/p>

                                                          Nedeni:<\/strong> Genellikle bu, bir agrega s\u0131n\u0131fland\u0131rma sorunudur (a\u015f\u0131r\u0131 miktarda veya \u00e7ok iri iri agrega), PCE sorunu de\u011fildir \u2014 ancak dozaj\u0131n yetersiz olmas\u0131, hamurun agregay\u0131 ta\u015f\u0131yamayacak kadar sert kalmas\u0131na neden olur.<\/p>

                                                          D\u00fczeltmeler:<\/strong> Kaba agrega miktar\u0131n\u0131 veya maksimum boyutunu azalt\u0131n ya da hamur hacmini art\u0131r\u0131n. PCE de\u011ferini ancak bu d\u00fczeltmeler yap\u0131ld\u0131ktan sonra ayarlay\u0131n.<\/p>

                                                          PCE ile VMA\u2019n\u0131n (Viskozite De\u011fi\u015ftirici Ajan) birle\u015ftirilmesi<\/h2>

                                                          VMA\u2019n\u0131n SCC\u2019de Yapt\u0131\u011f\u0131 \u0130\u015fler<\/h3>

                                                          Bir viskozite de\u011fi\u015ftirici ajan (genellikle welan veya diutan zamk\u0131 gibi y\u00fcksek molek\u00fcler a\u011f\u0131rl\u0131kl\u0131 bir polisakkarit), akma gerilimini fazla art\u0131rmadan su faz\u0131n\u0131n viskozitesini y\u00fckseltir \u2014 esas olarak suyun serbest\u00e7e hareket etmesini ve ince par\u00e7ac\u0131klar\u0131 ta\u015f\u0131mas\u0131n\u0131 engeller. SCC\u2019de VMA iki amaca hizmet eder:<\/p>

                                                          1. \u0130stikrar sigortas\u0131:<\/strong> Bu, ya\u011fs\u0131z, az toz i\u00e7eren bir SCC\u2019nin kararl\u0131l\u0131\u011f\u0131n\u0131 korumas\u0131na olanak tan\u0131yarak \u00e7imento miktar\u0131n\u0131 ve maliyeti azalt\u0131r.<\/li><\/ol>
                                                            1. Dayan\u0131kl\u0131l\u0131k:<\/strong> Bu \u00f6zellik, kar\u0131\u015f\u0131m\u0131n su i\u00e7eri\u011fi, agrega nemi ve PCE dozaj\u0131ndaki k\u00fc\u00e7\u00fck de\u011fi\u015fikliklere kar\u015f\u0131 toleransl\u0131 olmas\u0131n\u0131 sa\u011flar \u2014 yani beton tesisindeki ger\u00e7ek ko\u015fullar.<\/li><\/ol>

                                                              PCE-VMA Ortakl\u0131\u011f\u0131<\/h3>

                                                              PCE ve VMA birbirini tamamlay\u0131c\u0131 niteliktedir, birbiriyle rekabet halinde de\u011fildir:<\/p>