nˈoʊmˌoːɹ ðɐn hˈæf ðə klˈeɪ kˈɑːntɛnt ʃˌʊd biː ɛkspˈænsɪv klˈeɪz, wɪððə ɹᵻmˈeɪndɚ nˈɑːnɛkspˈænsɪv ɪlˈaɪt ɔːɹ kˈeɪəlˌɪnaɪt.
No more than half the clay content should be expansive clays, with the remainder non-expansive illite or kaolinite.